Update readme and license

Apatche 2.0
Clean up options
Add error checking.

Some work is still needed (like checking if IP address is reachable).
Fixed markdown of email addresses
Clean and add code to detect if target exists on network.
Add warning if run on windows
Add ARP Poisoning Script for testing
Clean up some code.
Script is now functional
Script is now functional
update readme
make description more clear
fix error check to ensure user does not try to defend their own IP address
add comments
update email