made use of the home controller's index action for calling #random_duel
defined 'PICTURES_PER_DUEL', fixed 'duels_pictures' to 'duel_pictures', created association to winning_picture
defined random_ids and random_duel. random_duel now returns a duel with pictures
set up view for home#index
fixed winning_photo column in duels table to be winning_picture_id
changed ::base to ::Base
changed root route to point to home#index
added (count) to random_ids so it returns the correct number of ids
page displays two pictures associated with a duel
Merge pull request #7 from victorpearson/fix-duel-model

Fix duel model