Adds model for Round, adds validations and relationships between Course
Adds model for Scorecard and ScorecardHole; updates schema
Adds User model; updates schema
Adds HolePosition model; updates schema
Renames the hole_id to hole_position_id in scorecard_holes
Removes relationship of user, adds scorecard
I can't spell "presence"
Adds more validations and relationships to models
Adds more seed data