Merge remote-tracking branch 'origin/master'

Author: fouber

README.md

@@ -28,7 +28,7 @@
 
 ## Usage
 
-> First of all, install [phantomjs](http://phantomjs.org/download.html), page-monitor relys on [phantomjs](http://phantomjs.org/) to render webpage and genenrate screenshot.
+> First of all, install [phantomjs](http://phantomjs.org/download.html), page-monitor relys on [phantomjs](http://phantomjs.org/) to render webpage and genenrate screenshot. DO NOT use ``npm`` to install phantomjs on winidows, it can't be launched by ``spawn``.
 
 ```javascript
 var Monitor = require('page-monitor');
@@ -103,4 +103,4 @@ monitor.on('error', function (data) {
 * ``notice``: console from webpage
 * ``info``: info from phantom
 * ``warning``: error from webpage
-* ``error``: error from phantom
+* ``error``: error from phantom