add second game test
v 1.0 of endGameFromUserExit testing
intermediate commit
fix bug: only one user from ended games messaged that the game has been ended from user exit
remove all created test game docs
Merge pull request #312 from tongxiang/userexit

1) Tests for "end game from user exit" functionality 2) bug fixes
first pass at Express 3-4 migration, all tests passing, gameplay working
change .send() to .status().send() and .sendStatus()