CampCollaborationHelper, GroupMembershipHelper with size-parameter
Invitation-Search for Group and Camp
CleanUp
fix
Camp und Group API Update
cleanup
Merge branch 'devel' of https://github.com/ecamp/ecamp3 into feature/login_stash

Conflicts:
	composer.lock
	composer.phar
Merge pull request #181 from pmattmann/feature/invitation-search-2

Feature Invitation Search for Camp and Group