[Contributors] Review pull requests and update

[RobDolinMS]

We should consider where the bar is for contributions.

@RobDolinMS to gather data on PRs/contributions/comments looking for natural breaks

[RobDolinMS]

The below data is for people who have a number of PRs (open or closed, merged or not merged) and who have at least one closed PR in the past nine months:

• 25 PRs:
  Ron Ratovsky
  Tony Tam
  Kris Hahn
  Mike Ralphson
  Darrel Miller
• 15-18 PRs:
  Rob Dolin
  Paŭlo Ebermann
• 6-10 PRs:
  Paul Hill
  Marsh Gardiner
  Erik Wilde
  David Biesack
  Jason Harmon
• 4 PRs:
  Tanya Fesenko
  Ralf Handl
• 3 PRs:
  Jeremy Whitlock
  Ole Lensmar
• 2 PRs:
  Logan Bailey
  Will Dady
  Tim Burks
  Rick Curtis
  James Watts
  Richard Gibson
  Robert Panzer
• 1 PR - Not listed

[ePaul]

Okay, next time I'll open many tiny PRs instead of a few big ones ;-)

[MikeRalphson]

We're now discussing moving to more of an 'all-contributors' model, so closing this. Thanks all.