1.5: Modified design so longer polling on I/O channels. Improved efficiency.
1.45: Fixed 0 payload transport packet bug
1.4:  Fixed Trawler sending malformatted IP Addresses bug.
1.31: Fixed topogen.rb and Makefile
1.3:  Corrected callback error, emulated node not picking up  neighbors error, and broadcast fix
1.2:  Corrected topology error. (In 1.1 would connect all nodes by default)
1.1:  Mostly working code