A proposal for a new webinterface

I made a web interface based chuchu's, but changed it to send its commands assynchrounously and have a nicer look. It should perform well on mobile devices, too.
It uses jQuery for the slider and the requests, and beautiful icons by http://icomoon.io
You can see screenshots [here](https://trac.mpc-hc.org/attachment/ticket/2927/2013-02-19_172200.png) and [here](https://trac.mpc-hc.org/attachment/ticket/2927/2013-02-19_172207.png). The slider has slightly changes since.
All scripts and styles are embedded into the file, but I can put them in seperate files if so desired.
I brought the filesize down to 105k, I hope that's small enough and doesn't blow the binary too much
This supersedes https://trac.mpc-hc.org/ticket/2927