Changed layout structure to support full screen headers

Hello Chris

We have a suggestion to change the layout structure. Basically we would like to have the footer and the header outside the bootstrap "container" element. Like this it would be possible for the header and footer elements to stretch over the full screen.
There are a lot of bootstrap templates doing exactly that (e.g. http://getbootstrap.com/examples/theme/).

We have not found any issues with the current javascript or css implementation nor should there be any visible effects on the current layout.

What do you think?

Kind regards
Markus