Add <!DOCTYPE project> to ANT build files to eliminate xml validation
warnings.

Change-Id: If3f2cc4baa6c0f8e77778eed63b1a9e529e2d094
Rename Commons and LiTest imports package names to com.processpuzzle.

Change-Id: I16e64042a83b96c9381d2c25b2eab35d0a974cd5