Add the old Bullet 2.x obsolete demos, and CMake buildsystem files, and gradually move them to newer Bullet 3.x structure

Use statically linked freeglut, instead of dynamic glut for the obsolete Bullet 2.x demos
Add the 'reset' method to b3GpuDynamicsWorld, and use it in the BasicGpuDemo (pretty slow in debug mode, use release mode)
Don't crash in btCollisionWorld, if there is no collision dispatcher

src/LinearMath/CMakeLists.txt

@@ -0,0 +1,72 @@
+
+INCLUDE_DIRECTORIES(
+	${BULLET_PHYSICS_SOURCE_DIR}/src
+)
+
+SET(LinearMath_SRCS
+	btAlignedAllocator.cpp
+	btConvexHull.cpp
+	btConvexHullComputer.cpp
+	btGeometryUtil.cpp
+	btPolarDecomposition.cpp
+	btQuickprof.cpp
+	btSerializer.cpp
+	btVector3.cpp
+)
+
+SET(LinearMath_HDRS
+	btAabbUtil2.h
+	btAlignedAllocator.h
+	btAlignedObjectArray.h
+	btConvexHull.h
+	btConvexHullComputer.h
+	btDefaultMotionState.h
+	btGeometryUtil.h
+	btGrahamScan2dConvexHull.h
+	btHashMap.h
+	btIDebugDraw.h
+	btList.h
+	btMatrix3x3.h
+	btMinMax.h
+	btMotionState.h
+	btPolarDecomposition.h
+	btPoolAllocator.h
+	btQuadWord.h
+	btQuaternion.h
+	btQuickprof.h
+	btRandom.h
+	btScalar.h
+	btSerializer.h
+	btStackAlloc.h
+	btTransform.h
+	btTransformUtil.h
+	btVector3.h
+)
+
+ADD_LIBRARY(LinearMath ${LinearMath_SRCS} ${LinearMath_HDRS})
+SET_TARGET_PROPERTIES(LinearMath PROPERTIES VERSION ${BULLET_VERSION})
+SET_TARGET_PROPERTIES(LinearMath PROPERTIES SOVERSION ${BULLET_VERSION})
+
+IF (INSTALL_LIBS)
+	IF (NOT INTERNAL_CREATE_DISTRIBUTABLE_MSVC_PROJECTFILES)
+		#FILES_MATCHING requires CMake 2.6
+		IF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.5)
+			IF (APPLE AND BUILD_SHARED_LIBS AND FRAMEWORK)
+				INSTALL(TARGETS LinearMath DESTINATION .)
+			ELSE (APPLE AND BUILD_SHARED_LIBS AND FRAMEWORK)
+				INSTALL(TARGETS LinearMath 
+					RUNTIME DESTINATION bin
+					LIBRARY DESTINATION lib${LIB_SUFFIX}
+					ARCHIVE DESTINATION lib${LIB_SUFFIX})
+				INSTALL(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+DESTINATION ${INCLUDE_INSTALL_DIR} FILES_MATCHING PATTERN "*.h"  PATTERN
+".svn" EXCLUDE PATTERN "CMakeFiles" EXCLUDE)
+			ENDIF (APPLE AND BUILD_SHARED_LIBS AND FRAMEWORK)
+		ENDIF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.5)
+
+		IF (APPLE AND BUILD_SHARED_LIBS AND FRAMEWORK)
+			SET_TARGET_PROPERTIES(LinearMath PROPERTIES FRAMEWORK true)
+			SET_TARGET_PROPERTIES(LinearMath PROPERTIES PUBLIC_HEADER "${LinearMath_HDRS}")
+		ENDIF (APPLE AND BUILD_SHARED_LIBS AND FRAMEWORK)
+	ENDIF (NOT INTERNAL_CREATE_DISTRIBUTABLE_MSVC_PROJECTFILES)
+ENDIF (INSTALL_LIBS)