jboner/akka — pull request #313 by rkuhn (2012-02-07 14:14:25+00:00)
Title: change serialization to strictly rely on subtyping

- when encountering new message type, check all bindings which map apply
- if multiple are found, choose the most specific one if that exists or
verify that all mappings yield the same serializer
- in case of remaining ambiguity, throw exception
- also add special handling for “none” serializer mapping: turn off a
default