20.1.0

Added

• Tileset now supports MutableMapping semantics.
  Can get, set, or iterate over tiles as if it were a dictionary containing tile glyph arrays.
  Also supports +, |, +=, and |= with other tilesets or mappings to merge them into a single Tileset.
• tcod.tileset.procedural_block_elements can take a tile shape and return a tileset.

Deprecated

• Tileset.set_tile(codepoint, tile) was replaced with tileset[codepoint] = tile syntax.
• Tileset.get_tile(codepoint) was soft replaced with tileset[codepoint] syntax.
• tcod.tileset.procedural_block_elements should be used with dictionary semantics instead of passing in a tileset.