Updated Tests

- Switched to v7-21 Instrumentation tests
- Added tests for SailthruUtils
Updated travis config
Changed travis avd to v-19
Updated travis config
Switched gradlew to local
Updated travis.yml
Testing build tools v19 on travis
Moved travis config
Testing gradle init
Testing travis config
Moved travis.yml to test sub projects
Testing new travis config
Moved travis.yml
updated travis.yml to use gradle 1.10
Added google play services to travis config
Testing default android config
Play services version to +
Switched compile version to 20
Switched compile version to 19
Build tools version to 21.0.1