Replacing KTempFile with QTemporarFile

[Albert Astals Cid]

The new QTemporaryFile in class seems a good replacement to KTempFile, but 
with the problem that it uses QDir::tempPath() as path to create the temp 
file so it can not be used to create files like KTempFile does in 
$KDEHOME/tmp-$HOST/appname/

Is that really an issue? If it is could we bribe trolls to add another 
constructor that accepts a path so we can pass it locateLocal("tmp", prefix)?

Albert