Merge pull request #25 from tappdarden/master

fix: IP ranges in iplist without community are ignored
fix: wrong type looking up the subnet address in the ips list

This broke refreshing a single equipment through the API
Merge pull request #26 from arielsalvo/master

fix: wrong type looking up the subnet address in the ips list
doc: also mention the need of NetSNMP to compile some modules
Try guessing communities with version 1 first and version 2 if unsuccessful.
Allows having version 1 turned off on the equipment.
Changed so that guessCommunity will also guess version

Uses guessed version for the plugin
Merge pull request #27 from arielsalvo/master

Try guessing communities with version 1 first and version 2 if unsuccessful