Calificacion CRUD added.
Protagonista CRUD added.
Director CRUD added.
Schema updated. Entities backed up.
Idioma CRUD added.
Premio CRUD added.
PelPre now has a single PK (needed for generating CRUD).
PelPre CRUD added.
Genero CRUD added.
Usuario entity added.
PK of Usuario changed to rut.
Pais now must have an association with Continente.
Fixed many-to-many association by adding inversedBy attribute.
Added JoinColumn option for pelicula and premio variables in order to specify that the association can't be null.
Second last name set to nullable.
ArrayCollection class added to Genero.
Removed many-to-many association between Director and Pelicula.
Created a join table between Pelicula and Director.
Removed unused ArrayCollection.
PelDir CRUD added.