Let's start with the simplest question.
In the tileset provided on Qiso's website there are 8 properties called like "disable-path-east". Are those the ones I need to set to False to make the tile walkable?
Now comes my problem, I can't find a way to check is two tiles are connected by a path (i.e. connected by a continuous series of tiles which are walkable in any direction). Qiso probably has some non-documented function which can do that. Maybe part of populateRoute() ? In that case, could there be a property called "walkable" or similar, to make this check easier?
Edit: My goal is to be able do check if two tiles (building) are connected and if so, add a bonus...