Log Message:
Update www/ruby-sass package to 3.1.11.

3.1.11

* Allow control directives (such as @if) to be nested beneath properties.
* Allow property names to begin with a hyphen followed by interpolation
  (e.g. -#{...}).
* Fix a parsing error with interpolation in comma-separated lists.
* Make --cache-store with with --update.
* Properly report ArgumentErrors that occur within user-defined functions.
* Don’t crash on JRuby if the underlying Java doesn’t support every Unicode
  encoding.
* Add new updated_stylesheet callback, which is run after each stylesheet has
  been successfully compiled. Thanks to Christian Peters.
* Allow absolute paths to be used in an importer with a different root.
* Don’t destructively modify the options when running
  Sass::Plugin.force_update.

Deprecations – Must Read!

* The updating_stylesheet is deprecated and will be removed in a future
  release. Use the new updated_stylesheet callback instead.

3.1.10

* Fix another aspect of the 3.1.8 regression relating to +.

3.1.9

* Fix a regression in 3.1.8 that broke the + combinator in selectors.

* Deprecate the loud-comment flag when used with silent comments
  (e.g. //!). Using it with multi-line comments (e.g. /*!) still works.

3.1.8

* Deprecate parent selectors followed immediately by identifiers
  (e.g. &foo). This should never have worked, since it violates the rule of &
  only being usable where an element selector would.
* Add a --force option to the sass executable which makes --update always
  compile all stylesheets, even if the CSS is newer.
* Disallow semicolons at the end of @import directives in the indented syntax.
* Don’t error out when being used as a library without requiring fileutil.
* Don’t crash when Compass-style sprite imports are used with
  StalenessChecker (thanks to Matthias Bauer).
* The numeric precision of numbers in Sass can now be set using the
  --precision option to the command line. Additionally, the default number of
  digits of precision in Sass output can now be changed by setting
  Sass::Script::Number.precision to an integer (defaults to 3). Since this
  value can now be changed, the PRECISION constant in Sass::Script::Number has
  been deprecated. In the unlikely event that you were using it in your code,
  you should now use Sass::Script::Number.precision_factor instead.
* Don’t crash when running sass-convert with selectors with two commas in a
  row.
* Explicitly require Ruby >= 1.8.7 (thanks Eric Mason).
* Properly validate the nesting of elements in imported stylesheets.
* Properly compile files in parent directories with --watch and --update.
* Properly null out options in mixin definitions before caching them. This
  fixes a caching bug that has been plaguing some Rails 3.1 users.