Create HTTP edge receptor

[zippy]

• [x] parse HTTP_REQUEST parse protcol
• [x] move current example code into base_defs
• [x] figure out routing between translation layers
• [x] add socket handling code to stream.c listener()
• [x] add conversion of HTTP_REQUEST tree back to ascii
• [x] new type of edge receptor for listening and spinning off streams. #137
• [x] use "connection" communication from #131
• [x] add token to xaddr (to use at the connection )
• [ ] create a stand-alone version of ceptr that can respond to an actual browser request.

[zippy]

52eaa6ac40 adds socket handling to stream.c

[zippy]

82776e0a27 adds first pass at listener edge receptor. still missing is a way to close the spun up reader/writers it spins up after receiving a connection, see #125