feature request #1012372 by jcfiala: Tried using hook_field_instance_settings_form to allow per-instance settings. Also, re-added a bunch of old tests from 6.x

Edited the two test files so that simpletests run without error, although they don't test nearly enough.

#696678 by Garrett Albright:Initial attempt at updating Link module to Drupal 7 - does not really work but is a start.