Add FIXME.
Define tilesets property as null.
Load only one map.
Unrequire blockset class.
Remove unused blockset code.
Initiate properties as null.
Prep for building ImpactJS tilesets.
Rename and simply tile class.
Store bank ID and map ID.
Prep. for building image data for maps.
Add newlines.
Move comments above code.
Add get_tilesets function to map class.
Do not require unused class.
Store tilesets in map object.
Load tilesets one after the other, not together.
Make sure tilesets is passed back so it can be stored.
Remove irrelevant TODO.
Add TODO.