Add note about Qt 5 compatibility.
Add note about Qt 5 compatibility.

nikhilm/qhttpserver,FreedomZZQ/qhttpserver,iptton/qhttpserver,arkpar/qhttpserver,iptton/qhttpserver,nikhilm/qhttpserver,nikhilm/qhttpserver,FreedomZZQ/qhttpserver,FreedomZZQ/qhttpserver,iptton/qhttpserver,arkpar/qhttpserver,arkpar/qhttpserver