Added a classbase for the major classes, makes dynamic_reference invalidation really work.

This also cleans up a bit of the code in the modestacker.

src/base.cpp

@@ -0,0 +1,25 @@
+#include "services.h"
+#include "modules.h"
+
+Base::Base()
+{
+}
+
+Base::~Base()
+{
+	for (std::set<dynamic_reference_base *>::iterator it = this->References.begin(), it_end = this->References.end(); it != it_end; ++it)
+	{
+		(*it)->Invalidate();
+	}
+}
+
+void Base::AddReference(dynamic_reference_base *r)
+{
+	this->References.insert(r);
+}
+
+void Base::DelReference(dynamic_reference_base *r)
+{
+	this->References.erase(r);
+}
+