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 #3876 - API find_resource by name even if name starts with integer

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

fixes #3519 - taxonomies include authorization module

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

fixes #3828 - set language locale for API messages and error responses

fixes #3925 - create apipie param_groups for API v2 to DRY documentation

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

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