Basic API
Add measure method to Pedometer
Proper JSON response from /metrics
Clean
Add verify_data_format to Pedometer
Add measure_time method to Pedometer
Add measure_time to time method on Pedometer, and time info in index view
Handle failures in /metrics
Ensure initialization success for User
Pass user into pedometer
Use stride length from user object
Fix broken integration test
Better calculation on User stride
Pass in user data in /metrics, use user sampling rate in measure_time
Clean
Add prerequisites to README