Removed Bootstrap 3 theme because Jess doesn't like it
Changes suggested by Tsyesìka
Just catch every error and be done with it.
Warn the user if Premailer or LXML fails to parse their email - in the latter case try and serve a plain text sibling

Fixes #144
Add some comments to views.inbox.email and clean up imports a bit
Control image loading in HTML emails

Fixes #64
Bypass image scrubbing/asking for plaintext messages
Full stop and don't hard code our name
Disable registration URL patterns and links when registration is disabled

I don't know how this got overlooked for so long.
Filter deleted emails

Fixes #145
Re-centre buttons on status page
Add __all__'s to inbox view modules and fix two bugs

The bugs were canceling eachother out :) (look at changed super() in SingleInboxView)
Method name should reflect what it actually does
Add tagged versions of unified inbox and home page
Implements basic tag searching

Fixes #148
Sorry screen-readers, I nearly forgot about you ☹
Give the user an option to exclude email from certain inboxes

Fixes #147
When in a TaggedHomeView, call the unified inbox "Tag Inbox" and disable badge
Labels > badges

Also clean up bootstrap config to only include things we actually need.
Use JS to bypass ugly GET params, but it falls back gracefully ☺