Remove old User controller actions/views

Devise handles most User actions. Keep only a 'show' action for
rendering user profiles.
Re-add set_user method for finding User

Find the user to show before rendering the views.
Apply BBYIDX skin to User registration edit form
Fix User registration form alignment

Form is indented one level too deep. Shift registration form one column
so that it fits into the box on the registration page.
Apply BBYIDX skin to sign-in form
Fix alignment of comment content

Shift content over to be positioned correctly when rendering user
comments.
Apply BBYIDX to Devise unlock/confirmation pages
Make Devise unlock email field use application CSS
Apply BBYIDX skin to Devise password views
Fix CSS classes in some Devise views

Due to a typo, some Devise views are using the wrong (non-existant) CSS
class for form submission buttons. Fix the class name to use the proper
stylings.
Fix missing form group div in Devise views

Unlock/Confirmation forms are missing the '.group' div. Add it back in
and shift the forms in one level to receive the appropriate form style
properties.