added source maps for LESS (fixes #196)

Gruntfile.js

@@ -6,14 +6,40 @@ module.exports = function(grunt) {
   grunt.initConfig({
 
     less: {
-            compileless: {
+      material: {
         options: {
-                    paths: ["less"]
+          paths: ["less"],
+          sourceMap: true,
+          sourceMapRootpath: "/",
+          sourceMapFilename: "dist/css/material.css.map",
+          sourceMapURL: "material.css.map"
         },
         files: {
           "dist/css/material.css": "less/material.less",
+        }
+      },
+      materialWfont: {
+        options: {
+          paths: ["less"],
+          sourceMap: true,
+          sourceMapRootpath: "/",
+          sourceMapFilename: "dist/css/material-wfont.css.map",
+          sourceMapURL: "material-wfont.css.map"
+        },
+        files: {
           "dist/css/material-wfont.css": "less/material-wfont.less",
-                    "dist/css/ripples.css": "less/ripples.less"
+        }
+      },
+      ripples: {
+        options: {
+          paths: ["less"],
+          sourceMap: true,
+          sourceMapRootpath: "/",
+          sourceMapFilename: "dist/css/ripples.css.map",
+          sourceMapURL: "ripples.css.map"
+        },
+        files: {
+          "dist/css/ripples.css": "less/ripples.less",
         }
       }
     },

dist/css/ripples.css.map

@@ -0,0 +1 @@
+{"version":3,"sources":["/less/ripples.less"],"names":[],"mappings":"AAAA;EACI,kBAAA;;AAEJ;EACI,kBAAA;EACA,MAAA;EACA,OAAA;EACA,UAAA;EACA,WAAA;EACA,YAAA;EACA,gBAAA;EACA,sBAAA;;AAEJ;EACI,kBAAA;EACA,WAAA;EACA,YAAA;EACA,kBAAA;EACA,iBAAA;EACA,mBAAA;EACA,qCAAA;EACA,WAAW,QAAX;EACA,qBAAA;EACA,UAAA;EACA,oBAAA;;AAEJ,OAAO;EACH,qDAAqD,iCAArD;EACA,YAAA;;AAEJ,OAAO;EACH,6CAAA;EACA,UAAA"}