[add]添加了按钮，可以正常上传图片
Merge branch 'gh-pages' of https://github.com/campaign/m-editor into gh-pages

Conflicts:
	editor_api.js
Merge branch 'gh-pages' of https://github.com/campaign/m-editor into gh-pages

Conflicts:
	editor_api.js
[fix]by Jinqn 完成插入图片流程
[fix]by Jinqn 完成插入图片流程