Merge pull request #3 from ZhangRGK/master

chrome plugin signin 错误版本,登录不能
增加了一个包
Merge branch 'master' of github.com:bigzhu/shuqian
用内容脚本和消息传递,取到了UserId,存入了插件的local storage
subscribe时有取到userId
监听 storage 失败,临时改为点击鼠标触发同步,土了.不过没法子的法子
未登录则进入网站登录，已经登录则弹出窗口提示上传书签
Merge branch 'master' of https://github.com/bigzhu/shuqian into redesign