beam: example 0
beam2/data: rename StructuredMessage to Msg
more msg
beam2/data; more formatting options: GetUint, GetMsg, ToHTTPHeader

* GetUint: parse an base10-encoded unsigned int
* GetMsg: parse a nested structured message
* ToHTTPHeader: export a message to an http header
beam2/data: msg.String and msg.Exists
beam2: updated example 0 with fd passing
beam2/unix: proof-of-concept stream multiplexing by fd passing. This is the future.
beam2: raw notes