Schema

			Users
			Column Name	Data	Detail
			id	integer	not null presence true unique true
			username	string	not null presence true unique true
			session_token	string	not null presence true
			password_digest	string	not null presence true unique true
				integer	has many challenge registers
				integer	user has many comments
			follow_id	integer	belongs_to user, also user has_many follows
					through association to friend workouts
			Workouts
			Column Name	Data	Detail
			id	integer	not null presence true unique true foreign key for users
			type	string	string representing biking or running or skiing
			duration	integer	total time represented in minutes
			miles	integer	total miles traveled
			friend_workout_id	integer	belongs_to workouts
			workout_date	date	date representing workouts
				integer	has_many comments
			route_id	integer	belongs_to routes
			user_id	integer	belongs_to user
			Bonus Challenges
			Column Name	Data	Detail
			id	integer	integer not null unique true
			title	string	string describing the challenge
			body	string	string describing the challenge
			register_id	integer	belongs_to user
			Bonus: Friends
			Column Name	Data	Detail
			id	integer	integer of friend that on a joins table
			user_id	integer	belongs_to user
			Comments
			Column Name	Data	Detail
			id	integer	integer not null unique true
			title	string	description of workout
			body	string	description of workout
			user_id	integer	belongs_to user
			workout_id	integer	belongs_to workout
			Routes
			Column Name	Data	Detail
			start location	float	decimal representation of start coordinates
			end location	float	decimal representation of end coordinates
					a route has many workouts