Merge pull request #1 from kissygalleryteam/master

在执行每一步的时候都能有个配置项可以执行自己的方法
新增stepChange事件
Merge branch 'master' of github.com:mailzwj/NGuide

Conflicts:
	1.0/guide/index.md
	README.md
Merge pull request #4 from mailzwj/master

Auto merge by kpm server