Delete local.properties

This file should not have been checked in
Add Apache License
Minor cleanup
Add blackbox tests for default Group List
Add blackbox test for Group creation via Drawer
Add blackbox test for swapping between Groups
Add blackbox tests for Group list selection
Merge pull request #50 from peter-tackage/member-list-fragment-testing

Group list testing
Update README.md

Add Google Play badge
Merge branch 'integration' into hosted-repo

Conflicts:
	open-secret-santa-app/build.gradle