Added Update Pass/Fail Grades Procedure
Added the original version of the procedure to the repo.
Modified Update Pass/Fail Grades Procedure
The procedure now checks the "Valid Grades - Term" reference table for
the valid passing grades. This resolves an issue where new valid passing
grades were not added to the procedure's list of grades to accept, and
those grades were not properly converted to grades of 'P' for pass/fail
courses.
Merge pull request #25 from maine207/mco/update-pass-fail-grades-proc

Mco/update pass fail grades proc