update TODO items

src/tangerine.h

@@ -9,16 +9,21 @@
 #include "GLDebug.h"
 #include "shader.h"
 #include "types.h"
-//#include "util.h"
+#include "util.h"
 
 
 /*
 * === TODO: ===
 *  - work on cleaner interface for initEntity and loadScene...
+*  - add a LOGF macro for printf style logging
+*		- replace instances of printf
 *  - full lighting model
 *  - test complex entities
 *  		- need a separate GLBufferToAttribMapping for each mesh on an entity
 *  - fix debug load times (either by using cgltf, or hiding tinygltf.h)
+*  - RenderGroups need to come into and out of existence during
+*		gameplay. So, we need to extend MemoryArena to be a pool allocator
+*		instead of an allocate only linear allocator
 *  - add libTangerine namespace?
 *  - merge back into libTangerine
 *