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/plugin/DynamicLibraryManagerException.h

@@ -0,0 +1,53 @@
+#ifndef CPPUNIT_PLUGIN_DYNAMICLIBRARYMANAGEREXCEPTION_H
+#define CPPUNIT_PLUGIN_DYNAMICLIBRARYMANAGEREXCEPTION_H
+
+#include <cppunit/Portability.h>
+
+#if !defined(CPPUNIT_NO_TESTPLUGIN)
+#include <stdexcept>
+#include <string>
+
+
+CPPUNIT_NS_BEGIN
+
+
+/*! \brief Exception thrown by DynamicLibraryManager when a failure occurs.
+ *
+ * Use getCause() to know what function caused the failure.
+ *
+ */
+class DynamicLibraryManagerException : public std::runtime_error
+{
+public:
+  enum Cause
+  {
+    /// Failed to load the dynamic library
+    loadingFailed =0,
+    /// Symbol not found in the dynamic library
+    symbolNotFound
+  };
+
+  /// Failed to load the dynamic library or Symbol not found in the dynamic library.
+  DynamicLibraryManagerException( const std::string &libraryName,
+                                  const std::string &errorDetail,
+                                  Cause cause );
+
+  ~DynamicLibraryManagerException() throw()
+  {
+  }
+
+  Cause getCause() const;
+
+  const char *what() const throw();
+
+private:
+  std::string m_message;
+  Cause m_cause;
+};
+
+
+CPPUNIT_NS_END
+
+#endif // !defined(CPPUNIT_NO_TESTPLUGIN)
+
+#endif  // CPPUNIT_PLUGIN_DYNAMICLIBRARYMANAGEREXCEPTION_H