Add option for custom child theme name

[contempoinc]

It would be an awesome addition if in the child theme step we could allow the user to add a custom name when they click "Advanced" — something like this:

[richtabor]

Hey, yea that's a good idea!

[JiveDig]

This would edit the child theme name constant in functions.php and at the top of style.css? I don't have a need for this but totally a great addition for many users I'm sure. Good idea!