Done and done

Should work now, but no way am I going to try it right before bed

The Strava API is kinda ugly

Retrieves activites from Strava

Uses pkg/browser to not require a clicky

Retrieves Fitbit activities

Adds words to the README

Dropping some boilerplate files

Removed extraneous globals

Completes Strava oauth workflow

Stubbed out getting Fitbit activity

Refactored to be better

Retrieves auth token from Fitbit

Retrieves code from Fitbit authorize endpoint