Tos mapupdate

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