Starting an attempt to create FSM-driven interaction with the library
Added a buffer reader (low level pair to buffer writer)
New message-level APIs
Starting point for pin-based io
Move to in-out pins and pinned data transfer
New MessageIO abstraction (message-oriented transport layer). Can be used by most message-oriented exchanges
* Cleaner IO handling for the echo server
* New multiplexor (not complete, will be improved)
Echo server uses new API
New and better chat server
Chat demo complete (chat client)
Cleanup