PTB BETA RELEASE "Sex, Lies and Video"

* OSX 10.9 Mavericks compatibility fixes. E.g., for AppNap protection, visual timing fixes, other brokeness fixes.
* Rewrite of OSX FontInfo and DrawText renderer for higher startup speed and compatibility and future proofing.
* Add new supported GPU's from AMD.
* Minor bug fixes for OSX, Windows, Linux, e.g., IOPort, Eyelink, PsychHID KbQueues.
* General improvements to video capture and video recording, e.g., for DV cameras.
* DC1394 based Firewire video recording support, high bit depths capture support, various other bells and whistles.
* DC1394 based Firewire multi-camera synchronized video capture/recording.
* Staircase procedure improvements by Diederick Niehorster.
* PsychColorimetric routines improved by David Brainard.