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

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

fixes #2763 - correcting doco links

fixes #3017 - split APIv2 controllers from v1 parents

fixes #2951 - Host API documentation lacks compute_resource_id

fixes #3256 - include members in usergroup show

fixes #3267 - API v1 compatibility for /api/hosts

fixes #3140 - API to allow importing of puppet classes

fixes #2810 - more restful API v2 JSON responses in puppetclasses

NOTE: breaking changes to API v2 api/lookup_keys does not exist, replaced by api/smart_variables and api/smart_class_parameters

fixes #3101 - list available images for CRs, add iam_role field to images API