Take a look at the instructions here http://qt-project.org/wiki/RaspberryPi_Beginners_guide
. These instructions will walk you through setting up a cross compiler environment, compiling Qt5 base and other modules, then installing it yourself. The bakeqtpi.bash file is very helpful!
Once you have Qt5 built and installed, try building some of the sample programs provided in the Qt5 source.
Once installed on your Pi, don't forget to export LD_LIBRARY_PATH to point to the directory that Qt5 is installed in - if you follow the instructions, this will be /usr/local/qt5pi - without this export your programs won't be able to find your Qt5 resources when you try to run them.
By the way, the daily build of Qt5 that were mentioned earlier are no longer being maintained, so you are better off trying to compile your own first