(maint) Add MAINTAINERS file

[kylog]

Hi @KevinCorcoran @cprice404 @camlow325 @rlinehan @justinstoller @haus @jpinsonault:

Anticipating some possible questions:

• This PR add a MAINTAINERS file to document who is maintaining this repo. The list of people started with the top 10 PR mergers in the last year, plus a little conversation here https://github.com/puppetlabs/kylo_scratchpad/pull/1/files#r76404602
• If the list seems wrong, let's feel free to edit it.
• The format of the file is documented here: http://github.com/puppetlabs/maintainers
• And I used https://rubygems.org/gems/maintainers to construct the file
• I pushed the PR branch to the puppetlabs space (rather than mine) so that all parties can edit collaboratively as needed
• Note that this is a public repo. The email and name fields are optional here. As a starting point, I pre-populated them with the publicly available names/emails available for all of us on github (but took bogus or non-puppet emails as an indication that you may not want to share your puppet.com email). Please feel free to edit your email and name fields for any reason.

[justinstoller]

Thanks @kylog ! I've added my work email. 👍

[camlow325]

👍 I added one more commit to scrub the old list of maintainer names from the README since we'll have them in the MAINTAINERS file now.

[jpinsonault]

Added my email

[cprice404]

🙈

[rlinehan]

lgtm

[kylog]

Any more signoffs we want on this sucker before someone hits merge (or squash-and-merge)?

[haus]