implements delete-meachanism for emails/phoneNumbers/im
read and write extensions in command object and implements extension validation
fix rebase failures
Added integration tests for groups. (not ready)
styling wip
impl. service extensions

success messages in group list marked as such

squash me ! :P
show all extensions in userEdit view
impl clear extension fields
show the extension(-fields) in lexicographical order
layout for extensions
prevent nullpointer on validate extension
add delete user function and js dialogs
Fixed spelling
Add integrationtest for delete of a user
add create user func
rename phonenumber to phoneNumer
add password field at create user
move create button
add successful remove msg
Added new tests from osng-487 and fixed them beacause of new features