Fix Issue 712, related to NVIDIA CUDA check in CMakeLists.txt
Enable btGImpact raycast optimization, thanks to C0DEFACE, see Issue 664
Cull triangle/AABB for concave/heightfield shapes, thanks to Danny Chapman
fix btGetCpuCapabilities, thanks to Ian Ollman! See https://code.google.com/p/bullet/issues/detail?id=738



git-svn-id: http://bullet.googlecode.com/svn@2657 08e121b0-ae19-0410-a57b-3be3395fd4fd
fix one of the btCompoundShape scaling issues, this fix breaks the API (need to add warning at the next release)

fixes https://code.google.com/p/bullet/issues/detail?id=374 and
https://code.google.com/p/bullet/issues/detail?id=444


git-svn-id: http://bullet.googlecode.com/svn@2658 08e121b0-ae19-0410-a57b-3be3395fd4fd
Add #ifdef BT_NO_SIMD_OPERATOR_OVERLOADS before including Bullet headers, to avoid clashes with XNAMath.h 
Fixes Issue 710
error C2084: function 'XMVECTOR operator +(FXMVECTOR,FXMVECTOR)' already has a body
error C2084: function 'XMVECTOR operator -(FXMVECTOR,FXMVECTOR)' already has a body
error C2084: function 'XMVECTOR operator *(FXMVECTOR,FXMVECTOR)' already has a body

git-svn-id: http://bullet.googlecode.com/svn@2659 08e121b0-ae19-0410-a57b-3be3395fd4fd