Added map of de/at/ch to Groups page. Tested on FF24, GC30, Safari 5
Merge pull request #433 from NicoleRauch/master

Validierung für doppelte EMail-Adressen (fixing Bug #409)
Merge pull request #434 from findingmarbles/master

Added map of de/at/ch to Groups page. Tested on FF24, GC30, Safari 5
can now send email to participants of activities
Merge pull request #435 from leider/master

can now send email to participants of activities
add info on how to install mocha
Merge pull request #436 from rtack/master

add info on how to install mocha
Added some tests to activities/submit and refactored it the same way as members/submit.
Added checks for endDate and endTime.
Inlined "sinon" to prevent from accidental use.
map now scalable
Merge pull request #437 from leider/master

map now scalable
changed default sorting of member table in admin view
if window is 1 column, map should be 100% of width
extracted validation method and reused it in members and activities.
Merge pull request #438 from leider/master

if window is 1 column, map should be 100% of width
Extracted the first function from index and moved into the new activitiesGroupsColorsAPI. Moved color and groupname calculation logic from jade file into activitiesGroupsColorsAPI.
Slightly beautified invitation markdown.
Simplified the passing of a function.
Added test for the newly extracted function.