This allows you to set custom file permissions on files created by
Paperclip.  Set the :override_file_permissions option to the octal file
permission you want - 0666 is the default. If you set
:override_file_permissions to false, then we will skip the explicit
chmod entirely. This makes filesystem storage a bit friendlier to filesystems
that don't support unix file permissions.

The +as_json+ method enables Attachment objects to be rendered as JSON
by Rails' JSON rendering framework. The Attachment object is not a
native ActiveRecord attribute, but it can be accessed via the +:methods+
option provided to the +to_json+ method.

This was previously fixed in pull request #539 but no spec was added at that time, and it has since been broken.

I fixed it and added a spec.

Updated README formatting

Fix language and typo in comments.

* Added more GitHub Flavoured Markdown syntax highlighting.

Fixes #913

Fixes #913.

Fixes #913.

Fixes #913.

Fixes #913

* Bug fix: Use the new correct Amazon S3 encryption header.
* Bug fix: The rake task respects the updated_at column.
* Bug fix: Strip newline from content type.
* Feature: Fog file visibility can be specified per style.
* Feature: Autonatically rotate images.
* Feature: Reduce class-oriented programming of the attachment definitions.

Rack gets a newline at the end of the content_type in certain instances: 'image/jpeg\r' which causes S3 to be unable to accept the file. Fixes #817