- unified motion tracking sample
Merge pull request #25 from googlesamples/fix/unified_motion_tracking_without_callback

- unified motion tracking sample
- removed unused lib
- fixed pointcloud matrices
- fixed area description sample sample matrices issue
Merge pull request #26 from googlesamples/fix/point-cloud-compiling-error

Fix/point cloud compiling error
Merge branch 'master' of https://github.com/googlesamples/tango-examples-c into experimental/ar

Conflicts:
	motion-tracking-jni-example/jni/tango_data.h
	motion-tracking-jni-example/jni/tango_motion_tracking.cpp