NPCServer+GServer update

[Admins]

The GServer and NPCServer have been updated to support instant saving of levels after doing tile modifications. The scripting commands are only available for the new scripting engine:

savelevel(levelname)
level.save(x,y) - the position (x,y) defines which map part is saved when you are on a gmap

Levels are only saved when there is really a modification, so it doesn't slow down the server when you are calling that command more than actually needed. It is displaying in RC chat when a level has been saved, can make that optional if it's spamming the RC chat too much.