Haml & Sass 3 Beta Release

Single line declarations are a huge one.

I believe renaming !variable to $variable is more intuitive for most web developers.

Also I've made the mistake multiple times of forgetting to use an equal sign rather than a colon.

These weren't show stoppers but they added extra complexity to an elegant solution.

I'm excited about the new changes.

  * No more = needed to use SassScript
  * $ instead of ! for variables
  * Support for CSS identifiers. E.g. solid instead of "solid"
  * Dashes can be used in place of underscores in variable names and sass functions.

  * Defining custom functions in Sass
  * Keyword arguments to mixins and maybe functions.
  * Support for a new directive called @extend
    that implements selector inheritance.
  * Optimizing compiler
  * Support for new core datatypes like List and Null