todo

README.md

@@ -37,9 +37,11 @@ some more practical uses would be things like:
 
 ## todo
 
-* implement Result return types on ::from functions so we can handle errors
+* implement Result return types on ::from functions so that we can handle errors
 * replace Image with Vec<u8> or something. seems like a pointless abstraction
 * replace game avatar with helper functions to get and set the sprite with an ID of A
+* implement PartialEq for tiles etc. for the sake of checking for duplicate tiles?
+* dedupe functions for tiles, sprites, etc.
 
 ### tidy up