Remove completed TODO.
Simplify block class (no longer render canvases).
Delete blockset class.
Start offsets as null.
Define blocks property as null.
Group similar functions.
Separate comments from code.
Simplify comment.
Prep. for getting blocks.
Add get_blocks function.
Remove bad arguments from block class.
Rename property.
Remove comment.
Define palettes property as null.
Define animations property as null.
Remove magic number.
Add FIXME.
Define tilesets property as null.
Load only one map.
Unrequire blockset class.