fixes #4188 - api/v2/status incorrectly shows api_version: 1

fixes #3960 - wrap APIv2 errors in an "error" node

fixes #4152 - fix syntax error in _form.html.erb for hosts and hostgroups

fixes #3909 - add disassociate and bulk action disassociate to interface

fixes #3920 - prevent 500 ScopedSearch errors on the API, raise UI errors correctly

fixes #3760 - API v2 define metadata @total for each controller

fixes #4023 - API v2 - compute resources partials should should attribute alias names and not database column names

fixes #3998 - API v2 error on /api/compute_resources, missing gce.json.rabl

fixes #3940 - extlogout page layout fixed

templates - sync from community-templates