todo

0. Can I incorporate system-getifaddr?

• Yes, and add "system/getifaddrs" to the list of required gems. No need for requiring rubygems

1. What's wrong with ethernet_ping? Solved
2. Why can't I rspec? Fixed
3. list devices (all os)
- add in the mac address listing thing
- fix the require system/getifaddrs
- make it possible to rake install on windows!! (Gemfile has special syntax, rest of "system-ifaddrs" just regex).
- downgrade windows ruby from 1.9.2 to 1.8.7


- add enable_pcap, ether_ping_server