Side-by-side diff view in Github

This extension will transform the diff view on Github to a side-by-side view. Just load a commit page and click the "Show Side-By-Side Diffs" button.

Things that work:
- Switch between side-by-side and unified diffs
- Previous comments are shown
- New comments can be added to any line, but they look funky until you reload.

Found a bug? Have a feature you'd like but isn't working? Please contribute at http://github.com/smike/diffhub.