added cppunit unit testing framework, using cmake, stripped out the original build systems.

added starting point for Bullet unit tests, with one example unit test
Enable the option BUILD_UNIT_TESTS in cmake to build the test. Note that the test doesn't automatically run.

UnitTests/BulletUnitTests/CMakeLists.txt

@@ -0,0 +1,17 @@
+
+INCLUDE_DIRECTORIES(
+	${BULLET_PHYSICS_SOURCE_DIR}/src
+	${BULLET_PHYSICS_SOURCE_DIR}/UnitTests/cppunit/include
+	
+	
+	${VECTOR_MATH_INCLUDE}
+)
+
+LINK_LIBRARIES(
+	cppunit BulletMultiThreaded BulletDynamics  BulletCollision LinearMath
+)
+	
+ADD_EXECUTABLE(AppBulletUnitTests
+			Main.cpp
+		  TestBulletOnly.h
+)