blender/extern/bullet2

This is the new refactored version of Bullet physics library version 2.x

Questions? mail blender at erwincoumans.com, or check the bf-blender mailing list.
Thanks,
Erwin

Apply patches/blender.patch to fix a few build errors and warnings and dd original
vertex access for BMesh convex hull operator.

Documentation is available at:
http://code.google.com/p/bullet/source/browse/trunk/Bullet_User_Manual.pdf
and:
https://github.com/bulletphysics/bullet3/tree/master/docs