Rename file and add new spec.

Renamed the student_retrieves_password to have the spec suffix to be
consistent with rails convention. Added a new spec file for the student
viewing scores.

 On branch rails4
 Your branch is up-to-date with 'origin/rails4'.

 Changes to be committed:
	renamed:    student_retrieves_password.rb -> student_retrieves_password_spec.rb
	new file:   student_views_scores_spec.rb