Revision control
++ QT += widgets
++ requires(qtConfig(completer))
++
++ HEADERS = fsmodel.h \
++ mainwindow.h
++ SOURCES = fsmodel.cpp \
++ main.cpp \
++ mainwindow.cpp
++ RESOURCES = completer.qrc
++
++ # install
++ target.path = $$[QT_INSTALL_EXAMPLES]/widgets/tools/completer
++ INSTALLS += target