Add return statements to controller methods
Add return statements to Day methods
Add return statements to View methods
Refactor Calendar::generate_calendar, renamed to generate_calendars, relevant tests updated
Update Controller#valid_format? for edge cases, update View::start_date_error to be more descriptive, update relevant tests
Remove blank line from day_calculator
Merge pull request #9 from Steveo1485/refactor-party

Refactor party