fixes #2931 - API v2 hosts JSON response, add *_name for each *_id

fixes #3018 - API v2 metadata for pagination, search, order in index collection json response

fixes #3011 - default root node name for api collections json response to :results but make it configurable

fixes #3737 - added PXEGrub specific PXE localboot template

fixes #3724 - correcting Red Hat names in some UI texts

fixes #3684 - add IDs to top level dropdown menus

fixes #3683 - display free and available space in vSphere datastore selection

fixes #3510 - plugin interface for registering a plugin, updated menu system

fixes #2763 - correcting doco links

fixes #3659 - use URL host for hostname, not URL itself