push paging information to view
implement limit handlers
Implements filter mechanism
Fixed 'activate all checkboxes'
implements sorting mechanism
Merge branch 'osng-495' of github.com:osiam/addon-administration into osng-495
obtimise editGroupMembership view controller
Merge branch 'osng-495' of https://github.com/osiam/addon-administration into osng-495
Merge branch 'osng-495' of https://github.com/osiam/addon-administration into osng-495
Merge branch 'osng-495' of https://github.com/osiam/addon-administration into osng-495
replace spaces with tabs
add new test data
Refactor tests
Add new tests of assignment and paging of user in groups
Add ids to make elements unique and usable for tests
Merge branch 'osng-495' of github.com:osiam/addon-administration into
osng-495

Conflicts:
	src/main/java/org/osiam/addons/administration/controller/group/EditUserMembershipController.java
	src/test/java/org/osiam/addons/administration/Element.java
	src/test/java/org/osiam/addons/administration/integration/EditGroupIT.java
Add new integrationtests for group membership
Remove duplicate methods