[Change] Updated TODO.

TODO

@@ -3,9 +3,11 @@ Vital:
   -- Better AI.
     -- Improved combat efficiency.
     -- Smarter missiles -> PID if possible.
-Major:
-  -- More missions and mission lua bindings.
+  -- Save improvements.
+    -- Save changes to universe in diff format.
+    -- Possibly predefine changes for easy update.
 
+Major:
 	-- Nicer AI.
     -- Ship fleet movement (Maybe based on boids?)
 
@@ -22,8 +24,6 @@ Major:
   -- More outfits.
     -- Beam weapons.
     -- Hangar bays -> Need escorts.
-  -- Save improvements.
-    -- Save entire game data except graphics, so that missions can modify stuff.
   -- Hybrid Ships.
     -- Start out with X skillpoints that get spread out by use, use fast at first.
     -- Can't use normal gear.