title: Cocos2d: Get data from file(jsb.jsc) failed
body: <p>I'm newbie in <code>cocos2d-x</code> <br>
  After creating <code>javascript</code> project with <code>create_project.py</code> command line and run the project, I see these warnings in the console: <br></p>
  
  <pre><code>Cocos2d: Get data from file(cocos2d-jsb.jsc) failed!
  Cocos2d: Get data from file(jsb.jsc) failed!
  Cocos2d: Get data from file(jsb_cocos2d_constants.jsc) failed!
  Cocos2d: Get data from file(jsb_cocos2d.jsc) failed!
  Cocos2d: Get data from file(jsb_cocos2d_extension.jsc) failed!
  Cocos2d: Get data from file(jsb_cocos2d_studio.jsc) failed!
  Cocos2d: Get data from file(jsb_chipmunk_constants.jsc) failed!
  Cocos2d: Get data from file(jsb_chipmunk.jsc) failed!
  Cocos2d: Get data from file(jsb_opengl_constants.jsc) failed!
  Cocos2d: Get data from file(jsb_opengl.jsc) failed!
  Cocos2d: Get data from file(jsb_cocosbuilder.jsc) failed!
  Cocos2d: Get data from file(jsb_sys.jsc) failed!
  Cocos2d: Get data from file(jsb_deprecated.jsc) failed!
  </code></pre>
  
  <p>There are no <code>.jsc</code> file in my project, it only has <code>.js</code> file instead. <br> 
  1. How can I get rid of those warnings> <br>
  2. Are there any recommended document for beginner about cocos2d javascripts? <br> 
  Thanks </p>