fixes #2411 - move to controller/concerns

fixes #2411 - move files to /app/services

fixes #2411 - move files in /models to /concerns, /services, /mailers, /observers

fixes #2411 - move STI models in /models and /lib/foreman/models to sub-folders

fixes #2797 - Submit the final code, not the diff in the config template editor

fixes #2779 - permission problem with non-admin adding puppetclasses to hosts and hostgroups

fixes #1770 - Refactored rdeckfacts definition to use facts_hash

fixes #2803 - apipie docs, rabl definition matches conventions

fixes #2142 add Smart Parameters and Smart Class Parameters to API v2

remove incorrect documentation in API v1 lookup_keys_controller