Update Venueless tokens

Determine traits based on ticket type.
Set different expiry of token for miniconf only tickets.

Update to Django 2.2

Upgrade site and modules to Django 2.2. Remove and replace obsolete
functionality with current equivalents. Update requirements to latest
versions where possible. Remove unused dependencies.

Fix checkin QR code URL

Use site URL in generated emails instead of hard coded domain.

Send errors from boarding pass emails to error log

Help troubleshoot errors

Allow accessing URL to generate boarding pass

Only needed some code fixups to function

Force upnprint badge

So automation can try again

Add last minute fixes to flow

Exception text storage and check in needs to be sepearte to badge.

Convience redirect on .conf/checkin

Send voli's to the overview, and everyone else to what we want from
them.

Base flow for checkin scanning

It's ugly... But it should do the job.

Ref #40

Decode the image so it can be re-encoded

#sigh

Refactor bpass build/send code

* Pull out the bits that prepare and build the bpass
* Make them not require a request object
* so that we can now call this code from another context

Enhance boarding poass processes

* Add a note about the creation date of boarding pass
* Add a link to ticket review page
* Try to handle some of the expected errors in the boarding pass
sending process
* don't just 502, try to handle the error and move on.

If no boardingpass, make one

- Use the first template in the system
- If there's no template, use /tickets/review as it at least gives
- people an overview of what they've paid for and warns them of
missing categories

Don't require login to view qrcode

* The qrcode contains no information that isn't in the URL you used to
access the code, so information is being leaked
* Allowing unauthenicated access lets people see the image in their
mail client

Not ideal. Let's revert this later and think of something better next
year - perhaps spending some more time researching best practices on
images in email..

Switch to png as a plain boring attachment

In the body of the email, we can load the image direct from the
site. Prolly gonna fail a lot but at least it's a loud known visible
failure

Revert to fixed string in email, for easier substitution

Harder to swap it out when it changes every time..

Add support for a "ready for boarding" group

This allows for the boarding functionality to be safely tested with
just a subset of users first. Once you're ready to go live Fur Reals,
just delete the group and all users will become eligible.

Create regidesk app

Shows summary of all attendees with a paid ticket, including
boarding_pass status.

Currently, regidesk allows staff with the requisite permission the
ability to view the checkin status of attendees, and email the user
their boarding pass email.

Included is a view for the user to retrieve their own QR code (in case
they got the plain-text version of the email, they can use this to
download an image to their phone for faster checkin)

git subrepo clone git@gitlab.com:LCA2018/registrasion-desk.git vendor/regidesk

subrepo:
subdir: "vendor/regidesk"
merged: "a8096d0"
upstream:
origin: "git@gitlab.com:LCA2018/registrasion-desk.git"
branch: "master"
commit: "a8096d0"
git-subrepo:
version: "0.3.1"
origin: "???"
commit: "???"