update sendMessage doc 
update sendMessage doc 

pol51/QXMPP-CMake,pol51/QXMPP-CMake,ycsoft/qxmpp,Ilyatk/qxmpp,gamenet/qxmpp_old,olesalscheider/qxmpp,olesalscheider/qxmpp,ycsoft/qxmpp,KangLin/qxmpp,Kaffeine/qxmpp,cccco/qxmpp,gotomypc/qxmpp,deepak899/qxmpp,Ilyatk/qxmpp,LightZam/qxmpp,unisontech/qxmpp,gotomypc/qxmpp,gamenet/qxmpp,Kaffeine/qxmpp,KangLin/qxmpp,gamenet/qxmpp,trulabs/qxmpp-old,projedi/qxmpp-ffmpeg,olesalscheider/qxmpp,pol51/QXMPP-CMake,gotomypc/qxmpp,unisontech/qxmpp,projedi/qxmpp-ffmpeg,deepak899/qxmpp,KangLin/qxmpp,Kaffeine/qxmpp,LightZam/qxmpp,ycsoft/qxmpp,deepak899/qxmpp,Ilyatk/qxmpp,cccco/qxmpp,trulabs/qxmpp-old,kollix/qxmpp,gamenet/qxmpp,kollix/qxmpp,unisontech/qxmpp,trulabs/qxmpp-old,gamenet/qxmpp_old,kollix/qxmpp,LightZam/qxmpp,gamenet/qxmpp_old,cccco/qxmpp