PTB BETA RELEASE "Rainbows, Droids & Compute Hippies!" SP12

* Make drawtext plugin on Linux and OSX more robust against weird fonts (non 8bpp fonts).
* Improve window focus handling for GUI windows on Linux. Don't steal window focus.
* Enable camerabin2 video capture and recording with GStreamer SDK.
* Enabe movie writing with GStreamer SDK 2013.6.
* Enable delay loading of GStreamer SDK dll's on 64-Bit Matlab on Windows to make installation optional.
* Fix regression in BubbleDemo.
* Allow sending arbitrary data types in NetStation().
* Performance improvements for DaqAInScan et al.
* Fix GLU toolkit NURBS functions regression, so they can be actually used.