Use constant for default object ACL
Store ACL in the S3 meta if different from the default
Add support for private objects when generating url by adding a default expiry
Use an existing non default ACL if the image is being updated
Remove constant checking of serve from S3 setting in filters, only add filters if setting checked. Ability to force the check inside get_attachment_url(() for external calls
Add new filter for resized image urls that would break in media screens if private object
Force check of serve from s3 setting in external function
Add default expiry constant
Better docblocs
Revert use of check serve setting
Merge branch 'develop' into filter-s3-meta
Make sure resized images always have the default public ACL
Merge pull request #147 from deliciousbrains/private-acl-object-support

Private acl object support