Set Markdown max-width to 100%

For many versions this has been a huge complaint of mine and a complaint of others in our development team.

On your filebrowser-readme class for the div element that renders a markdown file you explicitly set the max-width to 1200px. Why? Not everyone has the same monitor resolution as you. There is absolutely no reason to not use 100% here. In fact, most of our devs get so annoyed by this that we use a greasemonkey script to override your CSS and set it to 100% so it looks normal.

A lot of developers now are using large monitors, more specifically 27-30" so you guys need to make this element fit appropriately. I have attached an example of this before and after so you can understand what I mean.

Before:
http://i.imgur.com/VPfRqA8.png

After:
http://i.imgur.com/cVADT7Y.png

Please look into this issue to resolve this. It's been around forever and an explicit 1200px really doesn't apply with large screens.

This is also especially important as we are trying to use stash as a central location to keep some of the application documentation in a similiar way that you can use with GitHub.