Move app to Silex, add behat tests
Added testMode to Silex version of lunchbot
Fixed typecast of config object into Slack class
Fixed test mode to use a different config file
Merge branch 'feature/move-to-silex-original' into develop

* feature/move-to-silex-original:
  Fixed test mode to use a different config file
  Fixed typecast of config object into Slack class
  Added testMode to Silex version of lunchbot
  Move app to Silex, add behat tests

Conflicts:
	lunchbot.php