provide a default watcher-system

It should be extensible for other jobs.
add hets-support to god.
fix sidekiq-workers by preventing newline.
obey hound.
Merge pull request #1092 from ontohub/start_hets_api_on_machines

Start hets api on machines
move persisted? method to fakerecord
simplify target_path
add RepositoryDirectory FakeRecord
Add view for RepositoryDirectory
add DirectoriesController
Fix target_path methods (leading slash not allowed)
fix validation in RepositoryDirectory
activate directory creation
add comment on class purpose
use more delegates, remove redundant code
simplify committing mechanics
configure rspec mocks
fix specs on ontology deletion
sort directory listing by downcase name
fix empty repository !present? error