High quality resampling on mixdown, linear for playback.
* Lots of improvements and fixes for the JOS resampler, now it works fine!
* High quality filter coefficients for the JOS resampler (sorry for the 5 MB source file).
* Fix for GE orientation bug. Note: moto uses x,y,z,w quaternion storage, while rest of blender uses w,x,y,z.
* Minor changes/fixes.