add copied Science Sleuth config with removed OIPs
a-b testing changes to backend
Merge pull request #307 from tongxiang/a-b-testing

Add A/B testing branch & beta single-touch sign-in
Add config for 'Science Sleuth 5% A/B Test'
remove ab-test flags, add logic checking for query params in abtesting beta join mdata
Merge pull request #308 from ArielSD/a-b-testing

Add config for 'Science Sleuth 5% A/B Test'
Merge pull request #309 from tongxiang/remove-abtest-flag

remove ab-test flags, add logic checking for query params in abtesting b...
Merge pull request #310 from DoSomething/dev

merge for deploy single-touch beta opt-in
add second game test
Adds retry into mobilecommons requests
Removing 404 from the list of status codes to retry after
v 1.0 of endGameFromUserExit testing
intermediate commit
Merge pull request #311 from jonuy/issue-291

Adds retry into mobilecommons requests
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
Merge pull request #314 from DoSomething/dev

merge for deploy 1) MobileCommons retry implementation 2) endGameFromUserExit tests
first pass at Express 3-4 migration, all tests passing, gameplay working
change .send() to .status().send() and .sendStatus()