Increase social aspect of Railscasts.com

[KieranP]

Just jotting down thoughts.

@ryanb Feel free to pick the ones you think would fit well, and tell me to create new issues for each one, or do so yourself.

• Support other ways to login (facebook, twitter, google etc). omniauth should hopefully make that easy
• Add share buttons for various services (twitter, facebook, g+, etc). Gets people advertising Railscasts more.
• Add a 'Favourite' button, which stores the link between user and episiode and allows users to search/list favourites (as well as allows others to see someones favourites list).
• Ability to 'vote up' episodes (for new users to find the most thrilling episodes)
• Ability to 'vote up' comments (akin to stackoverflow)

[davoclavo]

+1