Fronts desktop tweaks

 * adding in 'features' collection
 * renaming 'trailblocks' template folder to 'collections'


Wide
====
![wide](https://f.cloud.github.com/assets/74132/1131490/fb3aed62-1bba-11e3-8e5d-626da5e2910c.gif)

Desktop
======
![desktop](https://f.cloud.github.com/assets/74132/1131483/ebcd5234-1bba-11e3-84aa-b6fbfced1831.gif)

Tablet
=====
![tablet](https://f.cloud.github.com/assets/74132/1131487/f11bad44-1bba-11e3-9799-2ba9726bedba.gif)