Initial import of flowmax.
update README with GPL blurb.
add IPv4 address generation code based on SIMUtools work.  modify
traffic.py to use that module, if available.  modify run.sh to
produce flow records by default.
Don't blindly eval parameters to traffic configurations; check types
and do the right thing.
Look harder for required networkx functions (dijkstra's algorithm
got moved in different versions of networkx --- just check both
possible locations).
better markdown for github
Add requirements file for easy setup with pip
Full switch to pytricia; pyradix is no longer used.
Clean up repo; ready to roll in initial sdn changes
Initial sdn changes; some tests broken and functionality isn't complete
move run.sh to script folder; modify conf files for configuration core changes
move run.sh to script folder; modify conf files for configuration core changes
Fix sim now in tests to correctly mock out what objects expect from simulation time advance
more revamping on config changes and simulator singleton
config/topology refactoring partially done
Fix debug/info log level
More configuration changes; new syntax to DRY things out
Style updates
Add capability to have empirical distributions loaded in config files
import two functions from heapq, rather than access them via dot