lib/zonify.rb: log AWS errors and continue
Use code from production

This was the version running in production.
Probably locally patched.
Change TTL of generated records to 10 minutes

Usually an IP for a node will not change, so a long TTL is desired. The
exception is if we assign an elastic IP to a node. In these cases, however
rare, we would like the change to propagate sooner than 24 hours.
Merge pull request #15 from airbnb/ttl-10-mins

Change TTL of generated records to 10 minutes
Merge remote-tracking branch 'upstream/master'
Downcase elb names with uppercase letters