Cleaned up how the threading is handled in MyGLRenderer.
1.   The clear operation creates Runnable code for the renderer thread, so
we can remove the clear hack that was put in yesterday.
2. Adding synchornization to how the touchQueue is passed between the UI
thread in MyGlSurfaceView and the renderer in MyGLRenderer.

Cleaned up some unused code.
Adding resource for a clear-screen icon (discrad icon).
Removing place holder red/blue action bar items, which did nothing yet.

Note that this requries API 14 or later.  I may revisit this to see if I
can easily add some kind of action bar type solution so I can continue to
support Gingerbread ( for my Blackberry Playbook! ), but for now, this
will suffice for testing.