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 #4423 - allow puppet classes to be imported by environment

fixes #3912 - add inheritance for locations / organizations

fixes #3553 - add "except" option to prevent puppet class import to select types of import

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

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

fixes #3515 - API handles not found objects with 404

fixes #3658 - support smart proxy's chef proxy feature

fixes #3853 - allow rabl template override to be specified

3853-taxonomy-rabl - changed style of override