doc improvement
doc improvement

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