Revision control

++ QT += dbus widgets
++
++ DBUS_INTERFACES += ../common/car.xml
++ HEADERS += controller.h
++ SOURCES += main.cpp controller.cpp
++ RESOURCES += icons.qrc
++
++ # Work-around CI issue. Not needed in user code.
++ CONFIG += no_batch
++
++ # install
++ target.path = $$[QT_INSTALL_EXAMPLES]/dbus/remotecontrolledcar/controller
++ INSTALLS += target