Upgraded to Spotify Apps API version 1.0.0 and fixed a bug with the bucket params

see https://developer.spotify.com/technologies/apps/upgrade-guide/1.0.0
for more information about the changes involved by the migration.
Fixed API Key and indentation
Merge pull request #3 from fabienric/master

Upgraded to Spotify Apps API version 1.0.0 and fixed a bug with the bucket params