Define a simple note detail view.
Bind listener and events to switch note detail

This required redefining Nevernote.notes as a model and changing that
models attributes rather than reassigning the variable itself to point
to a different model. Otherwise, the change event wouldn't fire.

Also, the new css width on the note detail view is temporary. That
should eventually be set using jquery.
Add note title editing
Add note content editing
Style note content and title edit field

Still working on figuring out a way to get the note content edit field
styled in a sane way.