CLAHub should subscribe to more GitHub hook events

[jasonm]

CLAHub knows to look and check the signature status on commits because it receives webhooks from GitHub notifying it of new commits.

Currently, CLAHub only handles to the "push" event: https://github.com/clahub/clahub/blob/master/app/controllers/github_webhooks_controller.rb#L7

It should handle more events, like "pull_request" - here is a list of the events: http://developer.github.com/v3/repos/hooks/

[jasonm]

Note to self: let Om know when this is updated.

[HimanGamage]

Can you resolve this issue ASAP. We need to verify the pull request before merge.

[jasonm]

Hi @HimanGamage - Thanks for checking out CLAHub, but I only work on this in my free time, so I can't promise any particular deadlines. I'm always happy to take time to review a PR for the functionality, though.