Update model fields to match latest fields from the API

Added the model fields Club.profile, Club.profile_medium, and Athlete.country fields to match the latest results from the API.
Merge pull request #11 from devlance/patch-1

Update model fields to match latest fields from the API
time.sleep() expects a float

Also handling case where python < 2.7 (datetime.timedelta.total_seconds is only available since Python >= 2.7)
Merge remote-tracking branch 'fork/feature/fix_time_sleep'