WHC_XML
自动把字典转换为xml数据####Use Example
NSDictionary * REQHDR = @{ @" TrnNum " : @" INHB2015042900000001 " , @" TrnCode " : @" 1957747793 " };
NSDictionary * REQBDY = @{ @" OS " : @" iPhone " , @" App " : @" CC " , @" IconVersion " : @" " };
NSDictionary * ebMobileStartupInqR = @{ @" REQHDR " :REQHDR, @" REQBDY " :REQBDY};
NSDictionary * xmlDic = @{ @" ebMobileStartupInqRq " :ebMobileSt
