change role of httpremoteserver, client send http request to httpServer, and httpServer send this request to httpRemoteServer
adding a new class MyDateTime for substitution of DateTime, and replace corresponding Datetime variable declaration to MyDateTime
add some functions, add an xml file and example files for downloading
change MyDateTime declaration from private to public, add new modified json data files
Merge remote-tracking branch 'origin/zhangjc' into release
fix remoteserver/ mydatetime client  bugs