Add FakeModel#valid?
Specify SSE correctly
Don't create an S3 instance if we have one already
replace t.has_attached_file with t.attachment as the former is deprecated and throws a warning.
Ensure the handle is closed after using OpenURI to get a remote file
Adds support for style-specific s3 headers and meta data
Code cleanup
Fixes problem when no s3 headers are defined
Adds integration test for style-specific s3 headers and metadata
Typo
Fix 'globaly' typo in S3 documentation.
Fix use of run_callbacks in Rails 4.
Merge pull request #1105 from benmanns/master

Documentation fix.
Update thoughtbot logo URL on README.md
Merge pull request #1106 from jviney/master

Fix use of run_callbacks in Rails 4

Rails 4 removed the second argument from `run_callback`.
Bump to 3.4.0
Update copyright to 2013
Merge pull request #1125 from thoughtbot/ap-update-copyright-to-2013

Update copyright to 2013
Updating Cocaine to ~> 0.5.0 to get latest fixes
Merge pull request #1139 from johnnyshields/master

Updating Cocaine to ~> 0.5.0 to get latest fixes