Client-side validation of confirm password on registration screen

Hey Tim,

I've been adding client-side validation to my app based off lift-mongo.g8, so I thought I'd contribute it back.  I'm still a novice with Lift and JavaScript, so be wary of my work.  I also need some help resolving the dependencies so I can build the g8 project and double check my changes.  If you have time to help me resolve that, I will be able to better ensure the quality of the pull requests.  Just let me know.