Schema

			Users
			Column Name	Data	Detail
			user_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
			workout_id	integer	not null presence true unique true foreign key for workouts
			friend_id	integer	association to friends
				integer	has many challenge registers
				integer	user has many comments
			img_url	string	user has an image
			Saving Workouts
			Column Name	Data	Detail
			workout_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
			location lat	decimal	decimal representation of lattitude
			location long	decimal	decimal representation of longitude
			miles	integer	total miles traveled
			friend_workout_id	integer	belongs_to workouts
			workout_date	date	date representing workouts
				integer	has_many comments
			Bonus Challenges
			Column Name	Data	Detail
			challenge_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
			Workout Stats/Totals
			Column Name	Data	Detail
			workout_stats_id	integer	integer not null unique true
			Bonus: Friends
			Column Name	Data	Detail
			friend_id	integer	integer of friend that links to user
			friend_name	string	string representing the name of the friend
				integer	has many workouts
			Workout Comments
			comment_id	integer	integer not null unique true
			title	string	description of workout
			body	string	description of workout
			user_comment	integer	belongs_to user
			workout_id	integer	belongs_to workout