Change the database, seeds due to the many to many relation between cats and items, creating show all categories
Merge branch 'master' into category

Conflicts:
	config/routes.rb
Managing the categories: add, delete, update an category, showing all items per each categories
Cleaning routes
Fix the add category, problem with routes
Merge branch 'master' into category

Conflicts:
	app/models/item.rb
	config/routes.rb
	db/schema.rb
	spec/features/login_spec.rb
Fix field from schema deletion