rooms definitions: need to scale the textures

[meszaros-lajos-gyorgy]

I have a nice wooden floor here, but it's way too small on the 50x50 tiles

my only option now for scaling is to tell the texture to fit-x and scale the room itself

example proposed syntax:

define room {
  floor custom textures [wood]oak-herringbone-parquet.jpg scale:2
}

[meszaros-lajos-gyorgy]

Implemented in 21.0.0-alpha.17