Gradle build of the application

[venkateshshukla]

The gradle build mimics the maven build script as far as possible.

1. api - gradle install compiles and installs the jar to local maven repo
2. app - gradle installDebug builds android apk and installs it to device/emulator.
3. instrumentation - gradle connectedAndroidTest runs instrumentation tests on the device/emulator.

[jdamcd]

This looks like a great start. Some general feedback:

• Gradle build should completely replace the Maven build
• Use Gradle wrapper
• Consider moving to the new standard package structure
• The instrumentation tests can be moved to the app project

[venkateshshukla]

The above mentioned changes are integrated. Please review them to see if any more changes are required.