Release 3.4.1

.travis.yml

@@ -1,5 +1,3 @@
 language: node_js
 node_js:
   - "8"
-before_install:
-  - npm install -g grunt-cli

Gruntfile.js

@@ -108,6 +108,20 @@ module.exports = function(grunt) {
       }
     },
 
+    /**
+     * Autoprefix CSS
+     */
+    postcss: {
+      options: {
+        processors: [
+          require('autoprefixer')({ browsers: 'last 2 versions, ie >= 11' })
+        ]
+      },
+      lib: {
+        src: 'dist/photo-sphere-viewer.css'
+      }
+    },
+
     /**
      * Minify dist CSS file
      */
@@ -287,6 +301,7 @@ module.exports = function(grunt) {
     'wrap',
     'uglify',
     'sass',
+    'postcss',
     'cssmin',
     'usebanner'
   ]);

README.md

@@ -44,17 +44,16 @@ Photo Sphere Viewer is available on [jsDelivr](https://cdn.jsdelivr.net/npm/phot
 
 #### Prerequisites
  * NodeJS + NPM: `apt-get install nodejs-legacy npm`
- * Grunt CLI: `npm install -g grunt-cli`
 
 #### Run
 
-Install Node and Bower dependencies `npm install` then run `grunt` in the root directory to generate production files inside `dist`.
+Install Node dependencies `npm install` then run `npm run build` in the root directory to generate production files inside `dist`.
 
 #### Other commands
 
- * `grunt test` to run jshint/jscs/scsslint.
- * `grunt serve` to open the example page with automatic build and livereload.
- * `grunt doc` to generate the documentation.
+ * `npm run test` to run jshint/jscs/scsslint.
+ * `npm run serve` to open the example page with automatic build and livereload.
+ * `npm run doc` to generate the documentation.
 
 ## License
 This library is available under the MIT license.