WIP: access service now responds to authorize

- authorize! to create or retrieve previous access creds
- set correct origin info for credential
- create measurement_origin for scale_measurement records

TODO: backfill specs :(
WIP commit
Moving data into a module and successfully merging data
Get data; need to test more feature from api
Before switching back to high limit
Going back to the batch retrieval
Bulk retrieval and updating code
Don't try to reauthorize if we already have access
Updating spec
Updating specs... again
Merge pull request #74 from ijustwanttocode/jr/withings_service_updates

Phase 1: Withings service updates