Fix to bug in Strava scope

Scope strings retrieved from Strava with token may contain hex codes, now fixed. Also updated scope to include when request is made through Strava app on phone

Prevent crash on failed token request

Previous version of StravaClient did not check response for token request so crashed on force unwrap of token if fail happened. Updated to check response and return error if request fails

Added authorisedScope function

Added capability in StravaClient to access the scope that was authorised on Strava login

Added additional info on Strava fail

Added NSURLErrorKey to response from Strava fail to provide the url causing Strava API fail in the NSError response

Added Strava API Counts

Update to StravaClient to retrieve and save Strava API usage and limits

Changed Router ID from Int to String

Changed Router ID from Int to String to support Strava Gear