Namespaces API for admin users

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Select2 tag for namespaces with ajax loading

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Admin can transfer project to any namespace

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Namespaces api specs

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
CHANGELOG entry

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'feature/admin_project_transfer' of /home/git/repositories/gitlab/gitlabhq
Merge branch 'master' of github.com:gitlabhq/gitlabhq