Progress update

Eugene's list:
(Done) 1. Finish "patch" command implementation.
(Done) 2. Implement "hist".
3. Try porting statistics and imaging toolbox from octave-forge (by request).
(Half-way done) 4. Re-enable OpenGL rendering. Add command to switch between Qt and OpenGL rendering. Debug an issue that was reported earlier - slowdown with OpenGL rendering.
5. Look at upgrading to LLVM 2.3 (or 2.4 if it is released by then.)

Samit is also making good progress on the new array class, and new type system implementation. He says that many of the unit test pass.