Initial commit of rolecontact module. With rolecontact, members of an admin-specified role are listed on a 'staff' page, with links to a themed subset of their profile data, ordered based on per-user weights. Each user also has a themed profile page, offering a (potentially different) subset of their profile details along with a link to the user's contact form: a contact form category is created for each user allowing any site visitor to send them email without revealing the user's email address.