added automatic native registration

added string include file
renamed typeutil and its functions
redid a bunch of the string natives
string natives now register

--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%40238

core/systems/PluginSys.cpp

@@ -1136,3 +1136,8 @@ void CPluginManager::OnHandleDestroy(HandleType_t type, void *object)
 {
 	/* We don't care about the internal object, actually */
 }
+
+void CPluginManager::RegisterNativesFromCore(sp_nativeinfo_t *natives)
+{
+	m_natives.push_back(natives);
+}