wow - what a bug

- leider ist the master of untested bugs!
merge

Merge remote-tracking branch 'upstream/master'
Merge pull request #107 from dpolivaev/master

Important bug fix and minor improvements in tests
merge
Merge remote-tracking branch 'upstream/master'
Prüfung des Gruppennamens:
Prüfung caseinsensitive
Merge pull request #106 from leider/master

peinlich...
Merge remote-tracking branch 'upstream/master'
- Groupstests in separates Verzeichnis
- Hinzufügen eines Groupstoretests.
-- Überprüft, ob das downcasing angestoßen wird
Add tests for activities (thnx jan), and move original tests to new folder
Merge pull request #109 from triplem/movetests

Add tests for activities (thnx jan), and move original tests to new fold...
add datepicker
Add datepicker to jade file as well
removed unused code
Merge pull request #108 from holgergp/master

Gruppennamenprüfung: Ein Gruppenname wird nun case-insensitive geprüft
Add datepicker
add timepicker
Merge branch 'master' into datepicker
Merge pull request #110 from leider/master

hygiene
Merge pull request #111 from triplem/datepicker

Add datepicker and timepicker
Cleanup of some async magic, also removal of duplicate code.