bug: don't create dup IP in history if another client claims the IP

Revert "at end of spoof loop, flush target arp entry"

This reverts commit e7a2288.

delete dead code

logs

cleanup code

log when mac changed IP

dont notify if IP is link local

LogAll to control debug messages

Cleanup Info log messages
Changed most messages to Debug

-fix segfault in arp handler

-updated goroutine pool with atomic

-added .gitignore
-go fmt

-fixed arplistener to pickup correct router mac

-cleanup