Seeds don't work without new permissions since 1.4.2

[brabster]

Change #161 updated the way seeds work to upload to S3 and apply a schema instead of a create/insert, to support larger seed files. Unfortunately, that is a breaking change for me - I have several small seed files and no access to upload to S3.

• Is there a way of toggling between the old and new behaviour? If not I can try and PR something in to do that
• Could you do something to detect changes that increase the scope of necessary IAM permissions? Newer versions require IAM access to athena:GetWorkGroup #262 is another change that required new IAM permissions that I don't have in my regulated environment