Change method for range String object to 'each_line'
Changed so that  is a string (containing the IP of the primary) as opposed to an array which IRB then interprets and adds in additional [] into the configuration, causing dhcpd to barf.
Merge pull request #2 from datacentred/pd265_ns1_upgrade

Pre-emptive Ubuntu 14.04 / Ruby 1.9.3 fixes