Incompatible license

[itf]

The project UI makes use of PyQt, which uses a GPL license, therefore, it has to use a GPL license instead of an Apache license.
This could be changed by changing the UI to make use of pyside, and then having parts of the code in LGPL and parts of it in apache (not sure if this is important)

[frans-fuerst]

Hm, that's bad - I thought pyqt was lgpl, too. But since I'm currently splitting core/UI into different projects I think your idea to have different license models is the best option. Personally I don't care whether the UI is GLP or LGPL - it will be always be free and open source anyway. I've chosen Apache because (IMHO) it's easier to change the license model later.