Listener not being an interface

_From [Tom.TSme...@gmail.com](https://code.google.com/u/114554914214268403750/) on September 09, 2013 11:07:07_

is there a reason why the com.esotericsoftware.kryonet.Listener is a class instead of an interface?

It is easier (at least for me) if the listener would be an interface.

_Original issue: http://code.google.com/p/kryonet/issues/detail?id=38_