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.

Test/Source/main.h

@@ -0,0 +1,25 @@
+//
+//  main.h
+//  BulletTest
+//
+//  Copyright (c) 2011 Apple Inc.
+//
+
+#ifndef BulletTest_main_h
+#define BulletTest_main_h
+
+#ifdef __cplusplus
+extern "C" { 
+#endif
+
+    extern int gReportAverageTimes;     // if 0, report best times
+    extern int gExitOnError;            // if non-zero, exit as soon an an error is encountered
+    extern const char *gAppName;        // the name of this application
+    
+#ifdef __cplusplus
+}
+#endif
+
+
+
+#endif