Merge pull request #64 from u0u0/master

issue #3347, min.js have not include chipmunk, fix running error.
issue #3493, fix Cocos2-html5 2.2.1 music play bug.
issue #3375, add sample code for chapter 8.
issue #3435, add sample code for chapter 9.
issue #3493, add sample code for chapter 10.