Implement checkin search
Fix #212 -- Add better attendance help message
Require permission in view to access checkin info
Remove fuzzy messages
Allow setting a fixed latest due date for payment reminders
Merge branch 'develop' of github.com:EuroPython/djep into develop
Deal with missing .organisation on SIMCardTicket
Update styling
fixup
Make highlight template tag case insensitive
Increase ids column
Merge branch 'ticket188' of https://github.com/DasIch/djep into ticket188
Actually search purchaser info
Use select_related in checkin search
Filter for purchase details
Merge pull request #204 from DasIch/ticket188

Fixes #188 -- Add view for info / sign-up desks
Split mail sending into smaller chunks of users and prevent failing on one user breaking the entire process
Reorganize theme colors
Add missing css btn class to buttons
Merge pull request #215 from EuroPython/fix/btn-style

Unify overall btn style class