Added support for a twitter feed component.  It's not generalised fully yet, and will need some work to take the 'RSS feed only' model into a more gadget based system.

Changed the refresh rate to every 10 minutes.

Added a config section in app.js to remove some of the magic numbers.

Fixed a minor bug in createCookie, two local var variables were being used outside of their scope.

Added extra column to db to support gadget settings (called Settings).