1) The "qmlscene grue.qml" command says that "module Grue is not installed".
2) There are extra things like class documentation in the files, which is not supposed to be there.
3) The directory structure should be flatter, so then the last \example page
should be in a separate child directory.
grue/qml_app <- the main grue.qml should be in here
QDoc tries to generate the child pages with the current directory structure.