Allow S3 client to send cache control headers on object creation
Merge pull request #108 from modethirteen/s3_cache_control

Allow S3 client to send cache control headers on object creation
cache control is not dependant on presence of ttl
Merge pull request #109 from modethirteen/s3_cache_control

cache control is not dependant on presence of ttl
logging of unhandled exceptions in Dream plumbing
Branch: dr-122