Github Module: More info on push notification

[euank]

Specifically, I think a git.io link + the commit message would be great. Example: from the official github irc service thing:

<git-notification> [ponscripter-fork] euank pushed 1 new commit to master: http://git.io/N-WAkA
<git-notification> ponscripter-fork/master f1c2ad5 Euank: Backport SDL2 fix from upstream...

You could likely compact it into one line or tweak it in other ways, but I think it's important to get most of the information there. Specifically, commit link, commit message, repository info, and committer.

[cbgbt]

Do you happen to know what the official service does if you've pushed multiple commits? Does it output a line for each one?

I didn't include a link to the commit because there can be several commits for a push.

[cbgbt]

Looks like github combines all of the commits into a comparison page:
8f6743d...69ab144

It then prints the sha and commit message for each commit on a separate line. I'm not sure there is a way to print that in an appealing manner without multiline.