Add Buildings and Trees to Tiberian Sun

Converted with my rudimentary TS-Asset Converter... 

things are missing:
- Rocks (comes also later)
- Veins (hole is in trees.yaml and will be together with Rocks in misc.yaml later)
- UfO is ommented out because the Ingame MapEditor blows up =( ....

to disable all Civilian Buildings in SP mode, set Owner to "None" in default.yaml ... ;) 
@pchote  is right: these should go away. With the ingame-editor you no longer need cheats to test these.