Logging classes should be deserializable

Found this library today, love it, moved tons of files over to it (from log4j) already.

The one issue I've found is that marking a Serializable class as Logging makes it unserializable - or un-deserializable, rather.

It seems that just marking the logger field as transient allows the class to be deserialized properly, and of course the field is recreated on the deserialized object.