Update gemspec for 2-4-stable branch.
Ensure Travis test latest 2.1.x.
Point documentation to correct source.

Also SVG badges and moved contribution info to separate doc.
Update RSpec 3.1.x spec support and syntax.
Throw RecordNotFound when wishlist is not found

Fixes #68
Regression test for issue #68
Fix add to cart
Add dependent destroy to wishlist's wished_product association to avoid orphaning wished_products if wishlists are destroyed
Fixes similar code in two :iter nodes.
Create pt-BR locale
Remove console.log from coffee file.