A question of common layouts
Hey guys, I'm checking out the rachet project, and it all looks very lovely. 
However, there's an issue has me a little worried. There's not really any mention of implementing common mobile layouts in your docs. What I mean by that is typical stuff like pinned headers, footers, etc. When I took a look at your examples, I found the header and footer height had been hard-coded into the padding of the content view. (which I find something of an abomination)

![screenshot 2014-09-02 00 08 20](https://cloud.githubusercontent.com/assets/520550/4112342/431479e2-3225-11e4-902c-04a9c774c9f9.png)

You can can tell this is a problem as soon as you start adding variations to the standard setup (header but no footer, footer but no header, no header or footer, taller header with footer, taller header without footer, etc) The number of possibilities is the cross product of the number of variations of each of the sibling views. So this becomes untenable in all but the simplest cases.

The way I've handled this in a project I'm currently working on is by using display:table & some absolute positioning. You can see this approach [explained here](https://github.com/p3drosola/css-mobile-app-layout).

Apologies for the rant. 
I'd be interested in hearing your opinions on the subject, pros, cons etc as I haven't found a mobile CSS framework that solves this nicely.

Thanks!
