diff --git a/fixtures/2019_sitetree.json b/fixtures/2019_sitetree.json
deleted file mode 100644
index 23ac4389a7786f2bbc86b230bacd675c412c2cc4..0000000000000000000000000000000000000000
--- a/fixtures/2019_sitetree.json
+++ /dev/null
@@ -1,621 +0,0 @@
-[
-{
-  "model": "sitetree.tree",
-  "pk": 1,
-  "fields": {
-    "title": "main",
-    "alias": "main"
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 1,
-  "fields": {
-    "title": "LINUX.CONF.AU 2019",
-    "hint": "",
-    "url": "/index.html",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": false,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": null,
-    "sort_order": 2,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 2,
-  "fields": {
-    "title": "Dashboard",
-    "hint": "",
-    "url": "dashboard",
-    "urlaspattern": true,
-    "tree": 1,
-    "hidden": false,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": 37,
-    "sort_order": 22,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 3,
-  "fields": {
-    "title": "django admin",
-    "hint": "",
-    "url": "/admin",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": false,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": true,
-    "access_perm_type": 1,
-    "parent": 9,
-    "sort_order": 3,
-    "access_permissions": [
-      52
-    ]
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 4,
-  "fields": {
-    "title": "Ticket Reports",
-    "hint": "",
-    "url": "/tickets/reports/",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": true,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": true,
-    "access_perm_type": 1,
-    "parent": 9,
-    "sort_order": 4,
-    "access_permissions": [
-      52
-    ]
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 9,
-  "fields": {
-    "title": "Admin",
-    "hint": "",
-    "url": "#",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": false,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": true,
-    "access_perm_type": 1,
-    "parent": null,
-    "sort_order": 37,
-    "access_permissions": [
-      52,
-      20
-    ]
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 19,
-  "fields": {
-    "title": "Schedule Edit",
-    "hint": "",
-    "url": "/schedule/edit",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": false,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": true,
-    "access_perm_type": 1,
-    "parent": 9,
-    "sort_order": 19,
-    "access_permissions": [
-      106,
-      107,
-      108
-    ]
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 20,
-  "fields": {
-    "title": "Home",
-    "hint": "",
-    "url": "/",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": false,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": null,
-    "sort_order": 3,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 21,
-  "fields": {
-    "title": "About",
-    "hint": "",
-    "url": "/about",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": true,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": null,
-    "sort_order": 9,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 22,
-  "fields": {
-    "title": "News",
-    "hint": "",
-    "url": "/news",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": true,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": null,
-    "sort_order": 10,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 23,
-  "fields": {
-    "title": "Attend",
-    "hint": "",
-    "url": "#",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": true,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": null,
-    "sort_order": 21,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 24,
-  "fields": {
-    "title": "Tickets and Prices",
-    "hint": "",
-    "url": "/attend",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": true,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": 23,
-    "sort_order": 25,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 25,
-  "fields": {
-    "title": "Accommodation",
-    "hint": "",
-    "url": "/attend/accommodation",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": true,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": 23,
-    "sort_order": 26,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 26,
-  "fields": {
-    "title": "Business Case",
-    "hint": "",
-    "url": "/attend/business-case",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": true,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": 23,
-    "sort_order": 27,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 27,
-  "fields": {
-    "title": "Shirts",
-    "hint": "",
-    "url": "/attend/shirts",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": true,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": 23,
-    "sort_order": 28,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 28,
-  "fields": {
-    "title": "Code of Conduct",
-    "hint": "",
-    "url": "/attend/code-of-conduct/",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": false,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": 37,
-    "sort_order": 39,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 29,
-  "fields": {
-    "title": "Terms and Conditions",
-    "hint": "",
-    "url": "/attend/terms-and-conditions/",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": false,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": 37,
-    "sort_order": 38,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 30,
-  "fields": {
-    "title": "Volunteer",
-    "hint": "",
-    "url": "/attend/volunteer",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": true,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": 23,
-    "sort_order": 29,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 31,
-  "fields": {
-    "title": "Programme",
-    "hint": "",
-    "url": "#",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": false,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": null,
-    "sort_order": 23,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 32,
-  "fields": {
-    "title": "Overview",
-    "hint": "",
-    "url": "/programme",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": false,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": 31,
-    "sort_order": 32,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 33,
-  "fields": {
-    "title": "Miniconfs",
-    "hint": "",
-    "url": "/programme/miniconfs/",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": true,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": 31,
-    "sort_order": 33,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 34,
-  "fields": {
-    "title": "Call for Papers",
-    "hint": "",
-    "url": "/call-for-papers/",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": false,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": 31,
-    "sort_order": 34,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 35,
-  "fields": {
-    "title": "Sponsors",
-    "hint": "",
-    "url": "/sponsors/",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": false,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": null,
-    "sort_order": 35,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 37,
-  "fields": {
-    "title": "Attend",
-    "hint": "",
-    "url": "#",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": false,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": null,
-    "sort_order": 31,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 38,
-  "fields": {
-    "title": "Tickets & Prices",
-    "hint": "",
-    "url": "/attend/tickets/",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": false,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": 37,
-    "sort_order": 30,
-    "access_permissions": []
-  }
-},
-{
-  "model": "sitetree.treeitem",
-  "pk": 39,
-  "fields": {
-    "title": "Shirts",
-    "hint": "",
-    "url": "/attend/shirts/",
-    "urlaspattern": false,
-    "tree": 1,
-    "hidden": false,
-    "alias": null,
-    "description": "",
-    "inmenu": true,
-    "inbreadcrumbs": true,
-    "insitetree": true,
-    "access_loggedin": false,
-    "access_guest": false,
-    "access_restricted": false,
-    "access_perm_type": 1,
-    "parent": 37,
-    "sort_order": 36,
-    "access_permissions": []
-  }
-}
-]