Visitors can see individual company pages.
Companies have many news items.
Visitors can see companies' news items on company page.
Users can edit and delete Holdings.

Errors if fields are blank.
Users can add Holdings.
Visitors can view employees on 'Team' page.
Users can delete employees.
Visitors can view random employee on front page.

Also, took out admin_path links because unnecessary -- Users will see
crud-menu when logged in.
Users can add employees.
Users can edit employees.
Users can associate news items with companies.

Added TA Group to seeds.rb so it would have id 1 and could have
news items associated with it. Offset holdings by
1 so that TA Group doesn't show on Holdings page.