add comment attribute to zone
provide a key when adding a new zone to the zone hash

This didn't get caught earlier as we'd never built the zone hash earlier. *le
sigh*
delete_hosted_zone() now handles HZ instances as well
bump minimum level of MXAS required
pod changes
filter out any NS/SOA records when copying a zone
make our UA more determined to talk to R53

Transient errors and timeouts are annoying -- hopefully this will help sort
that out.
v0.002

	* bug fixes, pod updates
	* use LWP::UserAgent::Determined to try to deal with transient issues