updateAppearanceToScenery

Adds ::become logg ::become kenix and ::become chomp commands.

Logg is represented as scenery id 8, a pile of logs. Kenix is represented as a scary tree id 407. Chomp is a synonym for "::become sheep". Can't think of good representations for Luis/Ryan at the moment.

While testing, discovered & fixed a bug with resetScenery(), where it would not correctly reset scenery if a boundary was on the same tile as scenery where no scenery usually exists.