SONATA-427 - Add checkout process stepper + fix final review template

I have added a checkout stepper and updated final review template page.

Stepper looks this like:

![capture decran 2014-02-05 a 13 58 42](https://f.cloud.github.com/assets/103900/2087122/a1dd80e0-8e65-11e3-98ca-64b55f5b2f79.png)

New final review template looks like this:

![capture decran 2014-02-05 a 13 59 47](https://f.cloud.github.com/assets/103900/2087124/aa5c18bc-8e65-11e3-8fcf-bca67599c832.png)