[+] 主要增加了圆圈手势的相关文档,更新了结构
[+] CircleGesture.md 完成 未校对
Merge branch 'master' of https://github.com/Jsonzhang/leapmotion_cn

Conflicts:
	LeapJS doc/1.home/leap_document_sdk.md
	LeapJS doc/2.Guidelines/MenuDesignGuidelines.md
	LeapJS doc/2.Guidelines/UserOrientationGuidelines.md
	LeapJS doc/2.Guidelines/readMe.md
	LeapJS doc/3.Programming Guide/readMe.md
	LeapJS doc/3.Programming Guide/API概览.md
	LeapJS doc/3.Programming Guide/第一个应用程序-helloworld.md
	LeapJS doc/3.Programming Guide/系统架构.md
	LeapJS doc/5.API Reference/readMe.md