[wip] IT's refactore
push paging information to view
implement limit handlers
Implements filter mechanism
Fixed 'activate all checkboxes'
implements sorting mechanism
obtimise editGroupMembership view controller
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
fix rebase failures
Merge pull request #29 from osiam/osng-495

i merge you!
implements a new (blank) view for edit group memberships
display groups in user-group-membership-view
add remove and add buttons
implements handler and service method for add/delete memberships
Implements add- and remove- functionality
implements filter mechanism
implements paging and sorting