Permissions Scopes in OAuth are invalid with current valid scopes

[abtris]

I tried https://github.com/strava/go.strava/blob/master/oauth.go#L35 public and get error but with activity:read_all all works as need it.

Swagger UI shows different scopes. I think we missing read and read_all instead public and view_private.

[dandandy]

FYI Looks like there's a pull request which should fix this #40

However looks like no one is maintaining this repo anymore...