Migrating to Perl 5.20/5.22

[David Evans]

On 7/14/15 4:32 PM, Mark Anderson wrote:
> I second perl 5.22. And that we should only support the latest perl.
>
> —Mark

Sounds good, Mark.  I think that makes the vote 3 to 1 so that probably 
covers the majority of people who are interested.

Lets go!!  Mojca?

Dave