diff view on commit with parallel diff view

in answer to request:
http://feedback.gitlab.com/forums/176466-general/suggestions/3788060-side-by-side-diff-view

I have made an parallel diff view on the commit show page.
Below are 2 screenshots.
It works with the big commit message.
Notes per line are still too wide; If someone has tips for this, please let me know.

Please let me know if this is what the view should look like.

![screen shot 2013-10-10 at 14 48 52](https://f.cloud.github.com/assets/4224518/1306180/5f22e6b2-31ab-11e3-90e3-4e9b17ec9399.png)
![screen shot 2013-10-10 at 14 49 01](https://f.cloud.github.com/assets/4224518/1306181/5f53d47a-31ab-11e3-858c-8a19cbb38a0a.png)