Olass

Added
* Add misc fixes to build and deploy tasks
* Add `validate_config` to check every config parameter
* Add `requests` as a requrement to fix a container deployment issue
* Add installation docs

Changed
* Improve coverage from 71 to 76%

Changed
* Simplify the structure of the request json and refactor logic for inserting hashes (Andrei Sura)
* Improve coverage to 84% (Andrei Sura)
* Update tasks*.py for new invoke version an update requirements (Andrei Sura)
* Specify log file: /var/log/uwsgi/olass.log (Andrei Sura)

Deleted
* Delete unused model: olass/models/oauth_grant_code_entity.py (Andrei Sura)

Added
* First working app release
* First working vagrant