Improve the README
Improve the README

TangMonk/wechat,wolflee/wechat-rails,zfben/wechat,EndingChaung/wechat,wolflee/wechat-rails,Dearest/wechat-1,JeeLiu/wechat,Eric-Guo/wechat,yxf/wechat,Eric-Guo/wechat,Dearest/wechat-1,Dearest/wechat-1,skinnyworm/wechat-rails