Handle argument as IPAddr if possible
Merge pull request #16 from otahi/handle_arg_as_ipaddr_if_possible

Handle argument as IPAddr if possible
Add a chain to test records with a specified zone file
Change chain from zone_file to in_zone_file
Fix incorrect description for specs
Merge pull request #17 from otahi/add_testing_with_zonefile

Add a chain to test records with a specified zone file