CDN images

Better but wont work with custom domain.

So a custom domain works as follows:
cdn.open-classifiends.com has a CNAME pointing to s3.amazonaws.com
then at amazon as name for the bucket you need to use cdn.open-classifiends.com

This has also an extra problem, that the HTTPS wont work... maybe best is that we do not allow custom domain.

So we leave it as you did since will build bucketname.S3domain (that may be different depending on the zone) and  checks if you have HTTPS or not. 

so all seems good so far ;)