Cosmetic
- Renamed "PerhapsLoaded" option to "Association"
- Make it possible to reference collections and the featured collection
  from the context of a product :
  {{#featured_collection}}
    <a href="{{url}}">{{title}}</a>
  {{/featured_collection}}
  Or :
  {{#collections}}
    <a href="{{url}}">{{title}}</a>
  {{/collections}}