Add method to get Bitmap from PlayerInfo. Must be called asynchronously
Update firebase when onPlayerChange is called
Re-add login check placeholder fragment
Merge in chat api
Merge branch 'master' of github.com:The-Real-CSCI201/TanksAndroid

Conflicts:
	app/src/main/java/edu/usc/csci201/tanks/PlayerInfo.java
Merge branch 'master' of github.com:The-Real-CSCI201/TanksAndroid