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

ObsoleteDemos/SerializeDemo/CMakeLists.txt

@@ -0,0 +1,78 @@
+# This is basically the overall name of the project in Visual Studio this is the name of the Solution File
+
+
+# For every executable you have with a main method you should have an add_executable line below.
+# For every add executable line you should list every .cpp and .h file you have associated with that executable.  
+
+
+# This is the variable for Windows.  I use this to define the root of my directory structure.
+SET(GLUT_ROOT ${BULLET_PHYSICS_SOURCE_DIR}/Glut)
+
+# You shouldn't have to modify anything below this line 
+########################################################
+
+IF(BUILD_AMD_OPENCL_DEMOS AND BUILD_MULTITHREADING)
+	SUBDIRS(AMD)
+ENDIF()
+
+INCLUDE_DIRECTORIES(
+${BULLET_PHYSICS_SOURCE_DIR}/src 
+../OpenGL
+${BULLET_PHYSICS_SOURCE_DIR}/Extras/Serialize/BulletFileLoader
+${BULLET_PHYSICS_SOURCE_DIR}/Extras/Serialize/BulletWorldImporter
+)
+
+ADD_DEFINITIONS(-DDESERIALIZE_SOFT_BODIES)
+
+IF (USE_GLUT)
+	LINK_LIBRARIES(
+	OpenGLSupport  BulletWorldImporter BulletSoftBody BulletDynamics  BulletCollision BulletFileLoader LinearMath   ${GLUT_glut_LIBRARY} ${OPENGL_gl_LIBRARY} ${OPENGL_glu_LIBRARY}
+	)
+
+	IF (WIN32)
+		ADD_EXECUTABLE(AppSerializeDemo
+			main.cpp
+			SerializeDemo.cpp 
+			SerializeDemo.h
+			${BULLET_PHYSICS_SOURCE_DIR}/build3/bullet.rc
+		)
+	ELSE()
+		ADD_EXECUTABLE(AppSerializeDemo
+			main.cpp
+			SerializeDemo.cpp 
+			SerializeDemo.h
+		)
+	ENDIF()
+	
+ELSE (USE_GLUT)
+
+	LINK_LIBRARIES(
+	OpenGLSupport  BulletWorldImporter BulletSoftBody BulletDynamics  BulletCollision BulletFileLoader LinearMath  ${OPENGL_gl_LIBRARY} ${OPENGL_glu_LIBRARY}
+	)
+
+	ADD_EXECUTABLE(AppSerializeDemo
+		WIN32
+		../OpenGL/Win32AppMain.cpp
+		Win32SerializeDemo.cpp
+		SerializeDemo.cpp 
+		SerializeDemo.h
+		${BULLET_PHYSICS_SOURCE_DIR}/build3/bullet.rc
+	)
+ENDIF (USE_GLUT)
+
+IF (NOT INTERNAL_CREATE_DISTRIBUTABLE_MSVC_PROJECTFILES AND NOT INTERNAL_UPDATE_SERIALIZATION_STRUCTURES)
+	ADD_CUSTOM_COMMAND(
+		TARGET AppSerializeDemo 
+		POST_BUILD
+		COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different ${BULLET_PHYSICS_SOURCE_DIR}/Demos/SerializeDemo/testFile.bullet ${CMAKE_CURRENT_BINARY_DIR}/testFile.bullet
+	)
+ENDIF ()
+
+
+IF (INTERNAL_ADD_POSTFIX_EXECUTABLE_NAMES)
+			SET_TARGET_PROPERTIES(AppSerializeDemo PROPERTIES  DEBUG_POSTFIX "_Debug")
+			SET_TARGET_PROPERTIES(AppSerializeDemo PROPERTIES  MINSIZEREL_POSTFIX "_MinsizeRel")
+			SET_TARGET_PROPERTIES(AppSerializeDemo PROPERTIES  RELWITHDEBINFO_POSTFIX "_RelWithDebugInfo")
+ENDIF(INTERNAL_ADD_POSTFIX_EXECUTABLE_NAMES)
+
+