Bugfix and update

* Added english translation
* Fixed bug when downloading election data with no candidacies (NPE)
* Migrated the whole project from Ant to Gradle
* Updated app version number from 1.1 to 1.2
* Added the 1.0 and 1.1 APKs to the repo
* Created a new 1.2 release
* Removed ABS submodule, added it directly to sources