choose qt4 or qt5

Sorry for my git/GitHub problems. I did some readings and saw what I did wrong. MY mistakes lead to messing up my forked repo again. I am new to collaborative working with git but I hope I will get the hang of it. Still have to figure out how to rebase changes though.

I wrote everything again from scratch and ran it through the same testing configurations again:
- Archlinux with Qt4
- Archlinux with Qt5
- Archlinux without Qt
- Ubuntu with Qt4
- Ubuntu with Qt5
- Ubuntu without Qt

Everything works just fine.