Merge pull request #41 from NicoleRauch/master

Cleaned up the REST API of the groups module.
Fixed Webstorm Problem with 'should'
Made DB Operations wait for completion before callback
merge
gerge remote-tracking branch 'upstream/master'
Changed test comments
made test more reasonable
Merge pull request #1 from ggramlich/leidermaster

parallel persistence store test
Merge pull request #42 from leider/master

Fixed the DB problem (...hope so)
use stubbed membersstore in members_test (again)
verify that membersstore is called with correct parameters
Verify that getSubscribedListsForUser for email is called
Merge pull request #43 from ggramlich/master

For members_test remove dependencies on mongo
Minor path corrections for required modules
The function that needs both groups and members now lives in its own module "groupsAndMembers". For clarity, an internalAPI for members is introduced as well.
Merge remote-tracking branch 'upstream/master'
Adapted test to new structure of members/index.js
Adapted test to the new structure with membersAndGroups/internalAPI, members/internalAPI and groups/internalAPI.