Fixed a bug in Application_Model_SetShowsPopulatedUntil
Updated readme for unit testing
Fixed hardcoded database name in AirtimeInstall.php
Merge branch 'unittests' of github.com:sourcefabric/Airtime into unittests
CC-5651: Unit Test the Scheduler

* Continued refactoring of the database creation.
* Database now persists after running tests but most of the tables are
  cleared.
* The unit tests run WAY faster now. :-)