Add Gradle wrapper.
Add some good starter defaults.
Add AmbilWarna as a dependency.
Ignore local.properties.
Migrate to Gradle for build.

* Minimum SDK version now 9 (Android 2.3 aka Gingerbread). Required by latest
  play services library.
* Remove checked-in android-support-v4 and dashclock-api (use ones from Maven
  Central).
Ignore IntelliJ/Android Studio files.
Android Studio doesn't like Gradle project aliases.
Ignore all build directories.
Improve Lollipop notification support.

* New vector-based icon that follows Material Design concepts.
* Charge notification now shows data even when locked.
* Removed unnecessary timestamp on charge notification.