Added: Suport for @Index and @OrderBy annotations on associations.
Added: Method save in Association class.
Added: Implementation of save method in ManyToMany associations.
Modified: Update join table on ManyToMany save method.
Modified: Update references in entity table in OneToMany association.
Fixed: Check for null values in association values.
Fixed: Storing element ids in one-to-many associations before update.
Added: nullable property in PropertyProfile class.
Modified: Updating associated table in one-to-many associations.
Modified: many-to-many annotations syntax.
Fixed: Checking total values before update foreign key in one-to-many
associations.
Fixed: Applying association order.