Prepare for v1.4 release (airbnb#96)

* Prepare for v1.4 release

* Update project dependencies (gradle version, Android plugin version,
build tools, appcompat, GPS, etc);
* Fix Google Maps project API key (old one was no longer working)

* Bump version. Add missing files

* Remove commented line

* Update travis config

* Update gradle plugin version

* Fix gradle config

* Another travis fix

* Fix lint

* Fix lint take 2

version 1.3.0

Initial open source release