fix readme
fix readme

jasl/ueditor_rails,greatbody/ueditor_rails,greatbody/ueditor_rails,happyming9527/ueditor_rails4,zcpdog/railsueditor,greatbody/ueditor_rails,zcpdog/railsueditor,happyming9527/ueditor_rails4,jasl/ueditor_rails,jasl/ueditor_rails,happyming9527/ueditor_rails4