Pull - I from kleinerm for PTB BETA RELEASE "Sex, Lies and Video" SP1

Make PsychtoolboxKernelDriver64Bit work on OSX 10.8 and 10.9 - hopefully. Only tested on 10. 9 so far.
Revert legacy 64 bit driver to September 2013 state for use on 10.6 and 10.7.