Added last batch of missing docs in `/app/`
Cleaned up the smoketest script

Removed unused parts, added basic docu comments (YARD).
Removed a runaway new line
Minor version bump to 1.0.0.beta.6

Changes:
* Added documentation for controllers
* Simplified DummyBackend
* Added a bunch of specs
* Added an initializer forcing rOCCI-core into a strict parsing mode