Added view for editing GradingRecords. This view shows a list of GradingRecords if the id param is not present in the GET data. Also renamed grading_record to view_records and fixed the redirect for that page to also point to the GradingRecord edit page.

from query import *
from subqueries import *
from where import AND, OR
from datastructures import EmptyResultSet

__all__ = ['Query', 'AND', 'OR', 'EmptyResultSet']