Add docs for the user interface module

doc-src/content/reference/compass/css3/user_interface.haml

@@ -0,0 +1,15 @@
+--- 
+title: Compass User Interface
+crumb: User Interface
+framework: compass
+stylesheet: compass/css3/_user-interface.scss
+meta_description: Declare an element inline block for all browsers.
+layout: core
+classnames:
+  - reference
+  - core
+  - css3
+---
+- render 'reference' do
+  %p
+    Provides mixins for the CSS3 User Interface module.

frameworks/compass/stylesheets/compass/css3/_user-interface.scss

@@ -1,16 +1,14 @@
-@import "shared";
-
 // User Interface ------------------------------------------------------------
 // This file can be expanded to handle all the user interface properties as
 // they become available in browsers:
 // http://www.w3.org/TR/2000/WD-css3-userint-20000216
+@import "shared";
+
 
-// User Select ---------------------------------------------------------------
 // This property controls the selection model and granularity of an element.
 //
 // @param $select
 //   [ none | text | toggle | element | elements | all | inherit ]
-
 @mixin user-select($select) {
   $select: unquote($select);
   @include experimental(user-select, $select,