new theme "full_screen" is full width with the option of having multiple columns

Resubmitted due to fixing brace in wrong place! sorry

Its a clone of the pfsense_ng theme. https://github.com/CharlieMarshall/pfsense/commit/eacde1d7d099032c35366e8caa10964efae55c3d is a clone of the pfsense_ng theme folder

Changes:

all.css:
- edited css to take up full width

loader.js:
- added jQuery to display new buttons (add/remove) columm.
- added jQuery to create new columns
- added jQuery to delete columns

index.php:
- amended to display multiple columns only if using this theme

pfsense_ng:
![old](https://f.cloud.github.com/assets/4223752/569143/ef2b0880-c6f2-11e2-9f7d-7dc3d0dc8e2d.png)

full_screen:
![new](https://f.cloud.github.com/assets/4223752/569146/2a19a960-c6f3-11e2-9591-e1fc4967c60b.png)