Apple contribution for OSX SSE and iOS NEON optimizations unit tests, thanks to Jordan Hubbard, Ian Ollmann and Hristo Hristov.

For OSX:
cd build
./premake_osx xcode4
for iOS:
cd build
./ios_build.sh
./ios_run.sh

Also integrated the branches/StackAllocation to make it easier to multi-thread collision detection in the near future. It avoids changing the btCollisionObject while performing collision detection.

As this is a large patch, some stuff might be temporarily broken, I'll keep an eye out on issues.

Extras/GIMPACTUtils/btGImpactConvexDecompositionShape.cpp

@@ -164,7 +164,7 @@ public:
 		float cpercent     = 5;
 		float ppercent     = 15;
 		unsigned int maxv  = 16;
-		float skinWidth    = 0.0;
+		float skinWidth    = 0.0f;
 
 
 		ConvexDecomposition::DecompDesc desc;