Automated test suite

[maltzj]

Issue with the NPE that I introduced made me realize that a set of automated tests to run simple flows through the app would be a good idea and hopefully prevent future bugs like that from sneaking in.

[manmal]

@maltzj Good idea! Could run on e.g. Travis. BTW, Android Annotations now works with Gradle. @peshkira knows how and could perhaps set it up if we ask nicely :)