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 assignment operators should look like this
````java
var = val;
````

So in this case:
````java
filled = (filled || length == 0 || height == 0 || width == 0);
````