Admin interface redesign

## New admin interface

This is an ongoing pull request that includes all changes we make for the 3.0 admin redesign.

## What we want to achieve:

* Resolution independent graphix (svg and icon fonts)
* Reduced ui
* Tablet (and mobile) friendly (adaptive / reponsive) layout

## This is the current state:

![screen shot 2014-01-04 at 13 49 37](https://f.cloud.github.com/assets/42868/1844611/b6d2f2f4-753e-11e3-96de-a471340bf2d4.png)

## Contribute

Please check out / fork the [3.0/backend-redesign](https://github.com/magiclabs/alchemy_cms/tree/3.0/backend-redesign) branch and discuss the ongoing redesign.