Merge pull request #1 from julycoding/master

merge master to my own repo
增加Java & Python示例（已添加的示例代码全部经过测试），后面3种示例稍后补充。
Merge pull request #2 from julycoding/master

Merge master code to my own repo
Merge pull request #40 from BrickXu/master

第一章1,2节示例代码添加Python语言&Java语言例子