UDP Fixes

-=-=-=-=-

Curse the day I decided to port UDP code, as it ended up
being two nights of work.  At least It's done now (I hope).

-Fixed UDP Support, API seems stable
-Added UDP Chat demo (chat that can lose your packets, heh)
-Added helpers to areas and bodies to get list of collided bodies and contained bodies.
-Sped up screen/viewport capture code.
-Added code to save an image as PNG
-Small fix so scripts register their singletons after modules did.

core/script_language.cpp

@@ -85,6 +85,13 @@ void ScriptServer::register_language(ScriptLanguage *p_language) {
 	_languages[_language_count++]=p_language;
 }
 
+void ScriptServer::init_languages() {
+
+	for(int i=0;i<_language_count;i++) {
+		_languages[i]->init();
+	}
+}
+
 Variant ScriptInstance::call(const StringName& p_method,VARIANT_ARG_DECLARE) {
 
 	VARIANT_ARGPTRS;