- removed check for missing fields in ad_creative
+ added missing fields for link ad to AdCreative
~ updated zuck.gemspec and changed AdGroup parent from ad_campaign to ad_set
- removed previously required fields from AdGroup (not required when specified in corresponding campaign)
~ updated AdGroup security check to better match facebooks current API description
~ renamed :creative_ids to :creative in AdGroup to reflect the current API
~ changed security check to match above mentioned changes
~ adjusted AdGroup so that less null-values are POSTed to the Facebook Server
- removed leftover to_json from if statements in AdGroup
+ added adgroup_status as required field to AdGroup (according to error messages of the Facebook API)
~ corrected the use of the creative field
~ only adding the object_url when it has been set in AdCreative
~ reduced used args to object_story_spec in AdCreative
+ added debug output
+ added to_json