Adds speaker registration data.

Addresses #77

Adds attendance by field report

Fixes #93

Adds ATTENDEE_PROFILE_MODEL as a thing that needs to be specified in settings.py.

Fixes #65

Adds a report for consumption of a discount.

Fixes #78

September website changes - Pre-registration (#66)

* Factors rendering of external links into its own template. Automagical!

* Adds wagtail templates for keynotes on the front page

* Migrates to Wagtail 1.6

* Migrates content pages to be a streamfield. Flexibility++.

* Fixes editing of ContentPage bodies

* Adds floating images to content pages

* Fixes the layout of floating images

* Adds anchor links to content pages.

* Adds presentation link to the keynote speaker block model

* LCA-ifies the schedule list

* Refactors cms_pages/content_page into a new base template

* cms_pages/content_page now derives from abstract_content_page

* news_index_page now derives from abstract_content_page

* news_page now derives from abstract_content_page.html

* utility_page now uses the content_page base template

* Factors out _right_floating_image.html

* Themes the presentation detail page

* Themes the speaker profile page.

* Themes the schedule list page.

* Minor work on schedule_conference.html

* Themes schedule_detail.html

* Replaces cradle.svg

* Adds a background image to the schedule pages

* Adds libravatar fallback for speaker profile images

* Adds new background images (must update colophon)

* Adds some magic so that we can have slightly different presentation backgrounds for different pages.

* Adds the sponsor block to the bottom of the page.

* Adds sponsor logos to footer.

* All migrations are now in this tree

* Fixes wagtail migrations

* Adjusts presentation_detail to allow for miniconfs (i.e. no target audience)

* Adds unpublishing to presentation detail

* Adds ScheduleHeaderParagraph, which allows us to add some text to the header of schedule pages.

* Adds NamedHeaderParagraph. It allows us to store header paragraphs in the CMS.

* Date formatting in the schedule

* First step for fixing images

* Allows us to automagically load the colophon

* Adds “publish changes” button.

* Can login with email address

Makes sure BCC is provided to *every* e-mail. (#65)

* Replaces the monkey patch on send_mail, and replaces it with a monkey patch on EmailMessage’s constructor.

* Removes spurious print statements.

* Minimum viable changes to get schedule to display (#64)

* All migrations are now in this tree

* Replaces the monkey patch on send_mail, and replaces it with a monkey patch on EmailMessage’s constructor.

* Removes spurious print statements.

When setting quantities on products, only raise errors if they’re due to changes made during the current call to set_quantities.

Fixes #54

Makes sure that discounts always apply to the most expensive product in the cart first. Adds test to that effect.

Fixes #88.

Re-adds admin for TimeOrStockLimitFlag

Fixes #82

Re-arranges invoice generation code.

- Reduces number of db queries
- Localises the code that interrogates the cart and the code that generates the invoice itself.

Replaces the final stage of guided registration with a review page, which shows after adding anything to your cart.

Fixes #87

Improves the error message when per_user_limit on category is breached.

Fixes #80

Propagates the per_user_limit category error to the products, rather than the category.

Fixes #79.

Restricts ‘amend’ product widgets to the original product.

Fixes #76.

Filters items_purchased by category.

Fixes #74

Adds an output_field type to reconciliation sums.

Fixes #75