Insert some parameters to costumize generation.
adds possibility to use parameters. remove worldlistener.
Removed WorldListener.java because i don't know why you set WorldType to normal.
adds possibility to use parameters. remove worldlistener.
Insert some parameters to costumize generation.

I think it's possible to do something better, but it's a begin
Merge pull request #74 from Hummtaro/master

Added generator customisation options.