renamed Assignment#past_due_date? to #past_all_due_dates?
renamed Assignment#what_past_due_date to #section_names_past_due_date
renamed Assignment#section_past_due_date? to #grouping_past_due_date?
Merge branch 'master' of git://github.com/MarkUsProject/Markus into rename-methods
fixed houndci complaints
Merge pull request #1925 from kubasub/rename-methods

Rename methods