add card.io project

If you have any questions about the card.io open-source effort, please contact me: dgoldman@paypal.com

Otherwise, let me know if you need me to change anything in this Pull Request, or if I can be of assistance in any other way.

Thanks!
I'm not sure the projects.js is still in use, I'll have a look. But shouldn't there be a comma between the SeLion object and the card.io object?