Update user access level when adding to group.
Extend API Issues, MergeRequets, Milestones with iid field
Explain iid in API
Merge branch 'readding_group_member' of /home/git/repositories/gitlab/gitlabhq
Links in Readme in tree view.
Merge branch 'feature/api_iids' of /home/git/repositories/gitlab/gitlabhq
Merge branch 'fix/relative_links_in_readme' of /home/git/repositories/gitlab/gitlabhq