implement create_group
implement delete_group
add update_group and yml config for groups
Add a group entity and implement retrieve all groups
Mark retrieve_all_groups as a feed
implement add_user_to_group
remove unnecessary copy of group xml
GroupMemberEntity class implementation
retrieve groups
implement remove_user_from_group
ensure direct property winds up as a string
retrieve groups for a specified user
merging pull request for groups
Merge branch 'thommay-provision_groups'