multipart upload fix

Merge branch 'master' of https://github.com/mpclarkson/StravaSwift

Make sure we only handle urls that are for Strava and not any url con…

…taining a code too

(Foursquare redirect urls also contain a code for example)

Athlete statistics

Merge pull request mpclarkson#5 from mpclarkson/swift-3.0

Swift 3.0

Immutability

Routes and streams

docs and clean up

Router requires ID not object

docs and method accessibility