Merge pull request #190 from DoSomething/dev

merge for deploy Science Sleuth gameplay config
Merge pull request #192 from DoSomething/dev

merge for deploy DonorsChoose.org API integration
Merge pull request #194 from DoSomething/dev

merge for deploy @13a0d31 - OIP config fixes for Science Sleuth
Add Musical Mixup specific opt-in/out
Merge pull request #196 from ArielSD/master

Add Musical Mixup specific opt-in/out