Last version fails under Linux

[dulsi]

I haven't looked at anything except the last one yet. It doesn't run under linux.

	graphics = {
		'grass': import_folder('../graphics/Grass'),
		'objects': import_folder('../graphics/objects')
	}

The grass directory in the graphics directory is all lowercase. The project runs fine after fixing this.

[raydleemsc]

change
'grass': import_folder('../graphics/Grass'),
to
'grass': import_folder('../graphics/grass'),