Revert "~ changed campaing_status to campaign_group_status in save"

This reverts commit 24e5c6f0fd60b91d1f76563efa55fe1c7ecf1a0b.
Revert "- removed redownload from creation args"

This reverts commit fdff838565e98fdc1a2d9890d1cc58ac9cd0e01b.
Revert "- removed start_time and end_time from campaign.save"

This reverts commit 7f4cb78fca746e8798936e10f85dce454ca1b867.
Revert "- revmoved lifetime_budget and daily_budget from AdCampaign"

This reverts commit 21c6cc68595f8977925bf2b2630d55404d32d11e.
Revert "- removed campaign_group_id from AdCampaign"

This reverts commit bafc91e9879c1de039253f250b8dd45fb2df3f6c.