Fixed empty vote name after editing
Fix #2056: strip whitespaces on slug generation
Do not convert the time of poll choices to local time

All users should see the times in a poll that were
originally entered by its creator. Localizing poll times
by default could lead to confusion if voters come from
different time zones. (Maybe add an option later to enable
localization for specific polls, if desired.)
Fix datepicker layout

The datepicker widget is now always stays top of buttons
Add choice text to summary tooltip
Fix regexes to actually catch invalid dates and times

Date and time selection without JavaScript is still ugly and buggy.
Maybe we should just disable it completely (or fix it, of course).
WSGI example file
Fix derp
Fixed recent migration for postgresql
Removed sentry setting from default config
Merge branch 'hotfix' into develop
Merge branch 'ghd'
Fixed error in statistics calculation when not selecting every choice