Enums and Fluent API

Added a new AthleteYear enum and renamed PlayerStatuses enum to
AthleteStatuses. Also added fluent API configuration to the athlete so
that the first and last name are max strings of 25.
MVC Athlete

Watching tutorials and playing around with MVC. Added content to the
home page. Created a Athlete Controller and View to start working on the
Athlete part of the site.