Added sync job for withings
Added parameter validation
Changed the how the service and importer are used by the sync job
Updating to match conventions
Merge branch 'development' into cd/background_data_get
Using easier boolean logic for type check
Structured the tests to make more sense
Merge pull request #55 from ijustwanttocode/cd/background_data_get

Added sync job for withings
Merge pull request #65 from ijustwanttocode/jr/challenges_part2

[challenges] Add cancan for Challenge
Merge branch 'development' into jr/challenge_participants