Account Creation / Update Dialog

[aldendaniels]

We need a nice dialog that:

• Takes your email address and confirms it
• Takes a password (twice and validates that it matches)
• Let's you choose a username.

After the campaign, we'll need to send an email with a unique link to all of our supporters to this form. We can't automatically create an account for them, in case they want to use a different email than the one they provided to kickstarter.

This same code should ideally be re-used to allow users to modify the above profile information after account creation.