get_maintainer.pl and change of email

[Nick Desaulniers]

It seems that get_maintainer.pl will make recommendations based on
commit history to a file, but over time, people change emails that
they commit from, then get_maintainer.pl recommends the possibly now
invalid email address.

I feel like we should have a look up table / file like MAINTAINERS
that tracks previous and new email addresses, which get_maintainer.pl
would parse, that way we have a record of movement between committer
email addresses allowing get_maintainer.pl to make more accurate
recommendations.  Thoughts?
-- 
Thanks,
~Nick Desaulniers