update TODO

TODO.md

@@ -33,16 +33,3 @@
 - check for memory leaks w/ valgrind
 
 ## DONE:
-- add palette texture colors to hexgrid
-	- map palette index to UV coords for shader in hexgrid render_group
-	- fill hexgrid uv buffer with coordinates
-	- set use_texture to true on hexgrid render_group render_objects
-	- update hgUpdateColorBuffer to change uv buffer instead of color buffer
-		rename function and replace calls
-	- remove current_color/stored_color from hex_info struct
-		- remove uses of these in hexgame.cpp and hexgrid.cpp
-	- re-arrange vertex attributes in shader and render_group to remove color_buffer
-- update hgUpdateColorBuffer() to use POD instead of gl_buffer
-- remove color buffer from render_group
-- implement texturing to reduce the number of meshes generated by assimp from materials (currently creates a sepereate mesh per material)
-	- need to do UV mapping on models, and parse UV data in shader