enhancement -> add a protocol stack transport layer

[GoogleCodeExporter]

For frames of packet type 0x10, the transmit packet payload (without the Xtend 
module) is a whopping 63 data bytes. Digimesh could certainly use a transport 
layer.

Original issue reported on code.google.com by r...@haystack.mit.edu on 29 Jan 2015 at 7:25