Add exists method to Bucket class.
Proper indentation.
Add newline at end of file.
Create object to ensure presence (Travis was failing the build).
Exists now returns false in the absence of a 200 on the response.
Update Bucket.php

Change bucket method exists to hasKey.
Update TestSuite.php

Change tests in order to accommodate introduced updates.
Merge pull request #64 from eveiga/master

Add exists method to Bucket class.