Fixes #2832: remove deprecated fog API and rackspace endpoint

fixes #2869 - refactor method find_nested_obj into API::BaseController

fixes #2424 - encrypts compute resource password

fixes #2424 - add Encryptable module and encryption_key generation

Fixes #2909: improve language on the welcome page around facts

fixes #2871 - params search works with nested hostgroups

Fixes #2501 - Allow my_hosts scope to include all subclasses of Host::Base

Fixes #2867: use the future relative tense for the orchestration process during provisioning

fixes #2766 Setting categories not consistently loaded and shown in dev

fixes #2838 - taxonomies controller - fix in params and finder