Add a full screen theme

Really basic theme its a clone of "pfsense_ng" with minor css changes to "all.css" to make it fit the screen better. Its not perfect the traffic graph font size is a little small but thats because its hard coded into the HTML! If we can move all css out of the HTML we can improve the themes easier.

I assume this is too late for 2.1 ?
Please test before merge

Before (pfsense_ng screenshot):
![old](https://f.cloud.github.com/assets/4223752/557313/a35de0b4-c3ee-11e2-8958-3f1534b5ecbb.png)

After:
![new](https://f.cloud.github.com/assets/4223752/557273/2036b526-c3ee-11e2-964b-1d2fc406f80d.png)