Remove extra horizontal rule
Extract previous/next buttons to a partial
Split form sections to their own partials
Previous/next section buttons are now on each page

This reduces some repetition in the form partial, too.
Remove unused form_picker_helper
Rename FormPicker to MainForm

It doesn't pick forms.  It's the main form.  We haven't added the form picker
yet.
Merge pull request #99 from jrunningen/master

Add nav buttons on all sections