fname and local_path in form creation functions

[thereseanders]

Should peer_create_form_review() and peer_create_form_rating() have separate parameters? I.e.:

• form_review/form_rating containing the file name of the review form. This would match the naming of parameters in peer_assign(), peer_return(), peer_score_review(), and peer_score_rating(), respectively.
• local_path containing the file location on instructors' machines.

Currently, users are required to specify only one parameter called fname.