Front end for detail.html, promotions, widgets, basket.html, checkout nav

Really sorry for the large commit!

Styling/markup for:  
- Detail.html - added varients to this page
- Basket.html.
 
Carousels: now using the same js
- Homepage, recently viewed, handpicked carousel, product gallery carousel, new featured product -- using styles for single product promotion (this could end up as a widget?)

Added markup for possible widgets
- Left the markup on the home.html (will be moved)

Added checkout navigation.

Tidied some less (more needed around buttons, navbar)

![Screen shot 2013-04-14 at 2 56 55 PM](https://f.cloud.github.com/assets/726265/377883/98226836-a4fa-11e2-89c9-0aeff757b327.png)

![Screen shot 2013-04-14 at 2 57 08 PM](https://f.cloud.github.com/assets/726265/377885/bf799b52-a4fa-11e2-8ffa-7e21ceed4d4f.png)
![Screen shot 2013-04-14 at 3 00 19 PM](https://f.cloud.github.com/assets/726265/377886/bfad03a2-a4fa-11e2-8158-e4bf1ef44fc2.png)
![Screen shot 2013-04-14 at 4 39 12 PM](https://f.cloud.github.com/assets/726265/377887/bfcb0fdc-a4fa-11e2-9386-367e0e143ac4.png)
![Screen shot 2013-04-14 at 4 45 41 PM](https://f.cloud.github.com/assets/726265/377888/bfce6cea-a4fa-11e2-8959-6e0a5a317029.png)
![Screen shot 2013-04-14 at 2 57 15 PM](https://f.cloud.github.com/assets/726265/377889/bfd15e82-a4fa-11e2-9286-e7f6e78188d9.png)
![Screen shot 2013-04-14 at 9 59 44 PM](https://f.cloud.github.com/assets/726265/377892/d8f753d0-a4fa-11e2-8aca-4f8a3ac30254.png)
![Screen shot 2013-04-14 at 10 00 31 PM](https://f.cloud.github.com/assets/726265/377893/f07f9418-a4fa-11e2-8f73-70c2675becc4.png)