Fixed failing unit tests and added tests for updating invalid out_of and duplicate names
Finished updating grade_entry_item_test.
Fixed 1 test error and 1 failing test. Added 1 test and 4 test stubs for new csv upload functionality
Finished grade_entry_form csv upload tests

Reverted old ISO-8859-1 test file to previous version.
Added more tests to show that uploading an already existing column
should update old column and uploading a new column will add the new
column and delete any old columns/grades associated with the form
before.
Changed how positions are being updated. Much better than the last version. Updated tests
Added tests for updating positions on new and update