Move type registration into module code, and fix problems with unloading of modules and type conversions registered inside of a module.

We have to allow the same type registration more than once now, just in case several different modules register the same conversion.

src/test_module.cpp

@@ -2,6 +2,21 @@
 #include <chaiscript/chaiscript.hpp>
 #include <string>
 
+class TestBaseType
+{
+  public:
+    virtual ~TestBaseType() {}
+    virtual int func() { return 0; }
+
+};
+
+class TestDerivedType : public TestBaseType
+{
+  public:
+    virtual ~TestDerivedType() {}
+    virtual int func() { return 1; }
+};
+
 std::string hello_world()
 {
   return "Hello World";
@@ -12,5 +27,19 @@ CHAISCRIPT_MODULE_EXPORT  chaiscript::ModulePtr create_chaiscript_module_test_mo
   chaiscript::ModulePtr m(new chaiscript::Module());
 
   m->add(chaiscript::fun(hello_world), "hello_world");
+
+  m->add(chaiscript::user_type<TestBaseType>(), "TestBaseType");
+  m->add(chaiscript::user_type<TestDerivedType>(), "TestDerivedType");
+
+  m->add(chaiscript::constructor<TestBaseType ()>(), "TestBaseType");
+  m->add(chaiscript::constructor<TestBaseType (const TestBaseType &)>(), "TestBaseType");
+
+  m->add(chaiscript::constructor<TestDerivedType ()>(), "TestDerivedType");
+  m->add(chaiscript::constructor<TestDerivedType (const TestDerivedType &)>(), "TestDerivedType");
+
+  m->add(chaiscript::base_class<TestBaseType, TestDerivedType>());
+
+  m->add(chaiscript::fun(&TestBaseType::func), "func");
+
   return m;
 }