Merge pull request #15 from ggramlich/master

Now with even less german
Merged together groups and groups_administration
Moved groups tests
Merge branch 'groups-refactoring'
Introduced events views
Refactored layouting
Test refactoring
Extracted event store
Merge pull request #16 from shishkin/master

Refactoring groups app
Listing events
Fixed link assertion
Merge branch 'master' into events
Constructing links from within the sub-app
Merge pull request #17 from shishkin/master

Listing events