Pull for basic Bits# support.

Support the most important Bits# display subsystem functions like video mode switching, diagnostic mode, mass storage mode, device identification and built-in video signal diagnostic in BitsPlusPlus and PsychImaging driver. Now the Bits# shares the lut tweaking and testing algorithm previously only available to VPixx DataPixx, ViewPixx and ProPixx devices. Thereby Bits# can "heal" itself automatically from display dithering interference and non-identity identity cluts in the graphics hardware due to shoddy operating systems.

Not yet supported: Some display system convenience functions, DAQ functionality, and PsychRTBox interop for RtBox response box emulation.

Tested so far successfully on Ubuntu Linux 12.10 64-Bit and OSX 10.7.5 64-Bit.

Also a bugfix to Screen for 64-Bit OSX 10.7.5 included.