Applies Dark_Shikari's Variable Adaptive Quantization patch v0.48 to libhb's copy...

Applies Dark_Shikari's Variable Adaptive Quantization patch v0.48 to libhb's copy of libx264. This major change to x264 drastically reduces blockiness on flat parts of the picture as well as blurring. It is on by default; to disable it, add "aq-strength=0" to your x264 options string. For now, it's only applied to jam builds. Make will come later.

git-svn-id: svn://localhost/HandBrake/trunk@1333 b64f7644-9d1e-0410-96f1-a4d463321fa5