fixes #812 - new permissions model, user group role and nest support, role filters for better granularity

• Daniel Lobato <elobatocs@gmail.com>
• Joseph Magen <jmagen@redhat.com>
• Tom McKay <thomasmckay@redhat.com>
• Greg Sutcliffe <gsutclif@redhat.com>...

fixes #4393 - rename ancestry label to title

fixes #4349 - API v2 - add location and organization child nodes to user, domain, subnet, etc show json templates

fixes #4198 - API v2 - add child nodes to show responses. Ex. architecture should show operating systems node

fixes #4222 Add capability to compute resource API to retrieve cluster,network,storage info on oVirt

fixes #3912 - add inheritance for locations / organizations

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

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

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