Revision control
++ QT += widgets scxml
++ CONFIG += c++11
++
++ SOURCES = trafficlight.cpp
++ HEADERS = trafficlight.h
++ STATECHARTS = statemachine.scxml
++
++ SOURCES += trafficlight-widgets-static.cpp
++
++ # install
++ target.path = $$[QT_INSTALL_EXAMPLES]/scxml/trafficlight-widgets-static
++ INSTALLS += target
++
++ RESOURCES += \
++ trafficlight-widgets-static.qrc