Github Plugin for Forum

#1

Modify Discourse-Github to better match our needs.

Suggestions from @james:

  • pull only the commits we want (something like LAST_WP_COMMIT...develop)
  • use the GitHub API instead of git log
  • pull from multiple repositories (migration plugin, APIs, etc.)
  • include people who have opened issues / commented

Note: we are only planning to get to this after the launch of the beta.