gui: add chess game playing example
tcpserver2: another test for gateway logic
messenger and gateway classes
me: hook up gateway collection
test: test submitter using new gateway code
book: pull out order, pricelevel, and book into own file
me: allow gateway to handle parsing
book: change types to indicate eXchange vs Gateway messages
me/gateway: initial version that relays responses back to sending gateway
feed: add feed handler and simple test listener; run gateway on all interfaces instead of just localhost