Notes: - added Hashed Overlapping Pair Cache, recommended by Pierre Terdiman. It works like a charm, thanks Pierre and Erin Catto - modified some margins inside btBoxShape, btCylinderShape and btSphereShape - added cone debug rendering (for cones with x, y and z up-axis) - added improvements for optional Extra/quickstep, thanks to Remotion - some performance improvements for Bullet constraint solver - moved 'refreshContactPoints' into the collision detector, instead of constraint solver - cleanup of many warnings, thanks Enrico - Libspe2 support of BulletMultiThreaded collision detection for Cell SPUs on IBM CellBlade and PS3 Linux. Thanks Minh Cuong Tran, Benjamin Hoeferlin, Frederick Roth and Martina Huellmann from IBM Extreme Blue (http://www-913.ibm.com/employment/us/extremeblue/)