Expand/complete existing tilesets

Currently, several blocks are exclusive to a single tileset or limited to a few tilesets. While some blocks simply wouldn't work in some sets, many of these blocks could (Crude awnings, stair variants such as spiral, half-stair and half-railings, balcony, etc.).

It would be nice to take these limited/singular blocks and see them in all/most of the other tilesets to give buildings more variety.