StatHat refactor + reporting fixes
- added a wrapper for StatHat calls in SGCompetitiveStoryController
- fixes number of players reported to start a game
- fixes end level reporting
- adds end level group reporting + more create and start game stats
Adding StatHat report for player starting a solo game
Distinguishing between alpha and beta users in end-level StatHat reporting
Making  a global var in tests
- fixes automated tests
Merge pull request #319 from jonuy/issue-238

Updated StatHat tracking for SMS games
Merge pull request #325 from DoSomething/dev

Merge for deploy from dev @ 337e5a5