fixes #8526 - file uploads are now possible via two_pane.

NOTE this will probably only work with HTML5 based browsers.
fixes #8513 - removing n+1 query from images#index
Fixes #8546 - Namespace interfaces and subnets to avoid a facts clash
fixes #8539 - refactoring a test to work for both GNU libc and Darwin libc
Fixes #5999 - vpc + pub ip -> attach pub ip
fixes #5841 - use inner query when retrieving reports for subset of authorised hosts
fixes #8228 - add a config_templates concern to serve config_templates controllers
Fixes #8400: Remove eager loading of puppetclass in lookup_keys index
Fixes #8401: n+1 query on group parameters host edit

Hostgroup tries to eager load the group parameters but there's an error
in the code that renders the eager loading useless.
Fixes #7032 - Rake backup accepts destination file
refs #7032 - fix documented backup filename
Fixes #8551 - use most specific matcher for inherited hostgroups

Host recieves correct smart_class_parameter value when multiple overrides for
inherited host groups exist for parameter.
Fixes #8416 - Fix Puppet classes form n+1 queries
fixes #8592 - allow plug-ins to modify multiple hosts actions

Refactoring patern: Extract method.
fixes #8590 - handle missing 'config' when listing vSphere VMs
fixes #8591 - explicitly set where to subnets.id
fixes #8477 - usability improvements to template locking/defaults
refs #8477 - fix string interpolation and spelling
Fixes #8620 - Remove useless back to host index link in multiple hosts action
fixes #8627 - add host comment field to API documentation