Adding perfect-scroll styles to cartoassets

package.json

@@ -47,7 +47,8 @@
     "gulp-install": "0.2.0",
     "gulp-sketch": "0.0.7",
     "grunt-shell": "1.1.2",
-    "load-grunt-tasks": "*"
+    "load-grunt-tasks": "*",
+    "perfect-scrollbar": "git://github.com/CartoDB/perfect-scrollbar.git#master"
   },
   "keywords": [
     "library",

src/scss/entry.scss

@@ -12,6 +12,8 @@
 @import 'cdb-utilities/fonts';
 @import 'cdb-utilities/helpers';
 
+@import 'main'; // Perfect scrollbar styles
+
 @import 'cdb-components/forms/checkbox';
 @import 'cdb-components/forms/dropdowns';
 @import 'cdb-components/forms/inputs';

tasks/sass.js

@@ -2,7 +2,10 @@ module.exports = {
   dist: {
     options: {
       sourceMap: false,
-      outputStyle: 'compressed'
+      outputStyle: 'compressed',
+      includePaths: [
+        'node_modules/perfect-scrollbar/src/css'
+      ]
     },
     files: [{
       expand: true,