Create 'In Process' versions of MessageReader/MessageWriter.

[cbaxter]

MessageReader & MessageWriter are currently dependant on FrameReader & FrameWriter. For in process communication, serialization is not required and as such, in process versions of each class will be required.

[jgoz]

I'd also like to investigate using Disruptor for inproc communication, but that'll be a separate task once we get there.