moved LaunchMeteor into more general Objects.ocd/System.ocg folder

This is to prevent errors on including objects that contain global functions. I believe this will be needed more in the future, thus there is now a new System.ocg folder.

planet/Objects.ocd/Environment.ocd/Disasters.ocd/Meteor.ocd/Script.c

@@ -82,19 +82,6 @@ public func FxIntMeteorControlSaveScen(obj, fx, props)
 	return true;
 }
 
-/**
-	Launches a meteor.
-	The meteor can spawn objects via spawn_id.
-*/
-global func LaunchMeteor(int x, int y, int size, int xdir, int ydir, id spawn_id, int spawn_amount)
-{
-	var meteor_skin = Meteor;
-	if (spawn_id) meteor_skin = spawn_id->~GetMeteorSkin() ?? meteor_skin;
-
-	var meteor = CreateObject(meteor_skin);
-	return meteor->Launch(x, y, size, xdir, ydir, spawn_id, spawn_amount);
-}
-
 /*-- Meteor --*/
 
 public func Launch(int x, int y, int size, int xdir, int ydir, id spawn_id, int spawn_amount)

planet/objects.ocd/System.ocg/Disasters.c

@@ -0,0 +1,16 @@
+/**
+	Contains functions that require definitions from the "disasters" folder.
+*/
+
+/**
+	Launches a meteor.
+	The meteor can spawn objects via spawn_id.
+*/
+global func LaunchMeteor(int x, int y, int size, int xdir, int ydir, id spawn_id, int spawn_amount)
+{
+	var meteor_skin = Meteor;
+	if (spawn_id) meteor_skin = spawn_id->~GetMeteorSkin() ?? meteor_skin;
+
+	var meteor = CreateObject(meteor_skin);
+	return meteor->Launch(x, y, size, xdir, ydir, spawn_id, spawn_amount);
+}

planet/objects.ocd/System.ocg/Info.txt

@@ -0,0 +1,2 @@
+This folder contains general functions that would otherwise go into the global System.ocg but depend on definitions in Objects.ocd.
+That way, the game can also be used without errors when Objects.ocd is not loaded.