add readme.txt
add readme.txt

down4u/WeiXinMPSDK,down4u/WeiXinMPSDK,lishewen/WeiXinMPSDK,JeffreySu/WxOpen,down4u/WeiXinMPSDK,wanddy/WeiXinMPSDK,wanddy/WeiXinMPSDK,JeffreySu/WeiXinMPSDK,mc7246/WeiXinMPSDK,jiehanlin/WeiXinMPSDK,mc7246/WeiXinMPSDK,mc7246/WeiXinMPSDK,JeffreySu/WxOpen,wanddy/WeiXinMPSDK,jiehanlin/WeiXinMPSDK,lishewen/WeiXinMPSDK,JeffreySu/WeiXinMPSDK,jiehanlin/WeiXinMPSDK,JeffreySu/WeiXinMPSDK,lishewen/WeiXinMPSDK