Update ruby-sass to 3.2.3.

3.2.3

* sass --watch no longer crashs when a file in a watched directory is deleted.
* Allow @extend within bubbling nodes such as @media.
* Fix various JRuby incompatibilities and test failures.
* Work around a performance bug that arises from using @extend with
  deeply-nested selectors.

3.2.2

* Add a --poll option to force sass --watch to use the polling backend to
  Listen.
* Fix some error reporting bugs related to @import.
* Treat protocol-relative URLs in @imports as static URLs, just like http and
  https URLs.
* Improve the error message for misplaced simple selectors.
* Fix an option-handling bug that was causing errors with the Compass URL
  helpers.
* Fix a performance issue with @import that only appears when ActiveSupport is
  loaded.
* Fix flushing of actions to stdout. Thanks to Russell Davis
  (http://github.com/russelldavis).
* Fix the documentation for the max() function.
* Fix a @media parsing bug.

  Deprecations -- Must Read!

* Sass will now print a warning when it encounters a single @import statement
  that tries to import more than one file. For example, if you have @import
  "screen" and both screen.scss and _screen.scss exist, a warning will be
  printed. This will become an error in future versions of Sass.

(taca)