Disable certain CSS files if PloneIntranet theme is enabled. refs #231
Add custom layout.pt for Dexterity Add/Edit views. refs #243
Add IPloneIntranetFormLayer for use with z3c forms. refs #243
Remove markup around <form> element. refs #243

The add form's contents gets inserted (via TAL macro) into an template
(layout.pt used by the add View).
Enable the custom template. refs #243
Move example views to examples.py module.