New NPC Command idea things.

[grim_squeaker_x]

Blah, here I go with my new NPC commands:

1. settileset filename; Allows the level maker to put in a custom tileset in his levels, this is already sort of possible with backpals, but a completely new tileset could be better in some cases.
2. setspriteset filename; To add to settileset you can also then make your own custom carrried bushes and the like.
3. setbacktile x,y; Sets a certain tile to be under the push/pull blocks terrain things.

I'll probably think of some more later