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/cppunit/include/cppunit/portability/CppUnitDeque.h

@@ -0,0 +1,25 @@
+#ifndef CPPUNIT_PORTABILITY_CPPUNITDEQUE_H
+#define CPPUNIT_PORTABILITY_CPPUNITDEQUE_H
+
+// The technic used is similar to the wrapper of STLPort.
+ 
+#include <cppunit/Portability.h>
+#include <deque>
+
+
+#if CPPUNIT_STD_NEED_ALLOCATOR
+
+template<class T>
+class CppUnitDeque : public std::deque<T,CPPUNIT_STD_ALLOCATOR>
+{
+public:
+};
+
+#else // CPPUNIT_STD_NEED_ALLOCATOR
+
+#define CppUnitDeque std::deque
+
+#endif
+
+#endif // CPPUNIT_PORTABILITY_CPPUNITDEQUE_H
+