fixed path string format argument for creating adcampaign (groups)
Avoid dict as default kwarg, to prevent access_token leaking between calls.
Merge pull request #7 from GallopLabs/bugfix/adcampaign-groups-path

Fixed path string format argument for creating adcampaign (groups)
Merge pull request #9 from agriffis/fixes

Avoid dict as default kwarg, to prevent access_token leaking between calls.
Bump up the version after incorporating the patches.