removed ruby dependency.

Gruntfile.js

@@ -38,7 +38,7 @@ module.exports = function(grunt) {
 		},
 
 		sass: {
-			main: {
+			dist: {
 				files: {
 					'css/theme/default.css': 'css/theme/source/default.scss',
 					'css/theme/beige.css': 'css/theme/source/beige.scss',
@@ -115,7 +115,7 @@ module.exports = function(grunt) {
 	grunt.loadNpmTasks( 'grunt-contrib-cssmin' );
 	grunt.loadNpmTasks( 'grunt-contrib-uglify' );
 	grunt.loadNpmTasks( 'grunt-contrib-watch' );
-	grunt.loadNpmTasks( 'grunt-contrib-sass' );
+	grunt.loadNpmTasks( 'grunt-sass' );
 	grunt.loadNpmTasks( 'grunt-contrib-connect' );
 	grunt.loadNpmTasks( 'grunt-zip' );
 

package.json

@@ -32,10 +32,11 @@
     "grunt-contrib-cssmin": "~0.4.1",
     "grunt-contrib-uglify": "~0.2.4",
     "grunt-contrib-watch": "~0.5.3",
-    "grunt-contrib-sass": "~0.5.0",
+    "grunt-sass": "~0.14.0",
     "grunt-contrib-connect": "~0.4.1",
     "grunt-zip": "~0.7.0",
-    "grunt": "~0.4.0"
+    "grunt": "~0.4.0",
+    "node-sass": "~0.9.3"
   },
   "licenses": [
     {