Happy pi release!

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Reverting this for now. This commit would better be in a minor release,
since it break everyone's application. Going to reopen the ticket and
mark it to be merged in next minor release.

This reverts commit b7b2b843.

Fix syntax error on ruby 1.8.7

This PR allows you to assign a URI object to an attachment. The
attachment is downloaded and saved with a proper content type and
filename based on the path of the URL.

When using the form_for helper in the example, we need to use users_path...

Readme typo fix

When using the form_for helper in the example, we need to use users_path and not user_path (which will point to the show action instead of the create action).

* Fixed tests and functionality for new fog and removed the fixed version from the gemspec
* Set time to 3600 from the current time so expiring actually works

According to the discussion in #923, it seems like this should be the
only way to fix this encoding debug issue. I'm also going to coordinate
with aws-sdk to get this fix in the upstream.

Fixes #923, #301

Let's keep it as class method, as Rails 3.0.x require migration methods
to be class methods.

This reverts commit 029fe02f.

* Added test for checking if path gets interpolated correctly without passing
  :path or :url options
* gsub default :rails_root filesystem-like path to nothing for Fog storage,
  just like in S3 Storage.

:class interpolates to the plural

`s3_protocol` now returns the protocol without a colon. If you need a
colon, you can pass in `true` as a second argument.

This might not be a best solution, so any better patch that does not
introduce a regression is welcome.

Fixes #921

* Add StyleTokenNotFound in Errors
* Adjust tests to make sure :style present where not currently defined

Now it includes :class and :id_partition