Seo breadcrumbs refactor

* Performs some rules for breadcrumb generation to make sure that we have three levels: 
* Re styled for narrow breakpoints:

Before: 
![bread-crumbs-before](https://cloud.githubusercontent.com/assets/986155/3042901/581663ca-e101-11e3-8fd6-c548f8850276.png)

After: 
![breadcrumbs-after](https://cloud.githubusercontent.com/assets/986155/3042910/6b672e78-e101-11e3-8638-76c08322c7ec.png)

Checked in google webmaster tool:
![breadcrumb-checker](https://cloud.githubusercontent.com/assets/986155/3042918/82ede294-e101-11e3-82f6-c5992c3896b6.png)