Rudimentary ssl cert check of one site

Works, but exits after one check

Works, but exits after one check

Loops over all and prints status

Bugfixing the logic, catching exception

Still tuning messages

Messages are pretty now

Correct for singular day and plural days

Undo Gemfile changes
Correct rubucop complaints
Merge pull request #376 from pburkholder/check-elb-certs

check all ELB https listeners for expiring certificates