Session end stuff working
Merge remote-tracking branch 'origin/JoyDev3' into StevenDev

Conflicts:
	UberTutorAndroid/app/src/main/java/ee461l/ubertutorandroid/InSessionActivity.java
	UberTutorAndroid/app/src/main/java/ee461l/ubertutorandroid/ReceiptActivity.java
	UberTutorAndroid/app/src/main/java/ee461l/ubertutorandroid/TutorHandshakeActivity.java
	UberTutorAndroid/app/src/main/java/ee461l/ubertutorandroid/TutorReceiptActivity.java