appwizard try2

[Bernd Buschinski]

I fixed the problem with invalid chars in foldernames with 
QUrl::toPercentEncoding, % works fine in foldernames on windows and 
linux(should also work on mac).
The problem is that it may looks ugly to have a folder like
"test¬{}" -> "test%C2%AC%7B%7D"
but keep in mind that "test¬{}" is also a very ugly project name :)

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