City of Tos Update

Last try to make a right commit...

The update includes:

tos.roo|.kod (Add: roofs and the walkable roof on the top of the
"Abandoned Fountain Tavern")
tosinn.kod (Add: entrance of "The Cellar")
toscellar.roo|.kod (Add: The Cellar)
toshidden.roo|.kod (Add: Maplink between "The Cellar" and the "Abandoned
Fountain Tavern")
tostarvern.roo|.kod (Add: Abandoned Fountain Tavern)
All nassary bgf-files for the new maps.

Also includes a overwrite for 2 vegetation objects, to let them look a
little bit smoother.

raztree1bgf
raztree1.bgf