Converting the contact popout to use the new forms

The g5-enhanced-form class was on the top-level div, so the form js was
removing everything inside, even the parts the show/hide script was
looking for. So I moved that lower and switched it to use the new way of
doing forms.
Undo some stuff from Lucia's work yesterday.

Some of those changes shouldn't be neccessary in the new setup.
Making Sticky nav work, and work in IE9

Also adding a target="_blank" to lead-forms fallback so the user can go
back to the site after filling out the form
Remove the cls_url option, it uses a helper now
Merge pull request #272 from G5/fix-contact-popout

Converting the contact popout to use the new forms