Changed product page based on the current user being the one who uploaded the product.
Added rentals helper.
Scope rental button to users, who are logged in.
Added a page to create rentals and generate a receipt.
Created hidden form to create rental from. Message is generated from the correct user variable.
Ignoring json files generated from rentals.
Changed the message to use subtitle class.
Added whitespace between form elements
Fixed bug where rentals_path_for_user were passed an id and not a user. Converted product_id in post to int.
Merge pull request #18 from kaspth/rental

Rent products and get a receipt.