Add unit test to make sure heap allocation of chai works

unittests/heap_allocated_chaiscript_test.cpp

@@ -0,0 +1,10 @@
+#include <chaiscript/chaiscript.hpp>
+
+
+int main()
+{
+  chaiscript::ChaiScript *chai = new chaiscript::ChaiScript();
+  delete chai;
+
+  return EXIT_SUCCESS;
+}