Add brick roof.
Implement up and down tiled maps.
Render roof and walls of upper building floors.
Fix typo.
Ignore up/down maps in relative_tile_position_rec().
Roof rendering improvements. Also --tiles_debug client option.
Align roof_brick.111.png
Add roof_brick.131.png and roof_brick.151.png
Further roof rendering improvements: now works better with FoW and LoS, among other things.
Support balconies, simplify some code logic.
Add roofs to Brynknot bank and Brynknot tavern.
Separate balcony's map info from the building's map info.
Render building's roof when on the balcony.
Set outdoor 1 on Brynknot bank and tavern upper floor maps.
Add support for lighting on different sub-layers.
Fix rendering of objects with changed sub-layer inside buildings.
Fix invalid read issues reported by Valgrind.
Fix "cleared" variable of player's MapCell structure not being reset properly.
Change variable name.
Move common variable into function's scope.