Merge pull request #18 from camilotorresf/register-pin-selection

Optimization to pin loaders page
Select cool items automagically loads more items

In the admin, when viewing cool items for a category:
/admin/category-manage_cool/1
When you scroll down, automagically the page loads more
items for you.
when there are no more items, you can see a button to load
more in case you need to.