Cubes!

I added cubes to worldedit. As well as a helpful command, platfrom. This feature have been both tested farelly well in only bukkit. I add a new configuration feild for cubes because going off MaxRadius didn't seem to make sense. Also adding the raise flag for pyrmids. Note this commits might not look right because I kinda suck at using git but I am getting better. 
The new argument should be annotated with @Optional, seeing as it's not required. Also consider making it a flag, like "r" rather than creating a boolean argument. Boolean arguments are very awkward.