Revision control
++ QT -= gui
++ QT += dbus
++
++ HEADERS += ping-common.h
++ SOURCES += ping.cpp
++
++ target.path = $$[QT_INSTALL_EXAMPLES]/dbus/pingpong
++ INSTALLS += target
++ QT -= gui
++ QT += dbus
++
++ HEADERS += ping-common.h
++ SOURCES += ping.cpp
++
++ target.path = $$[QT_INSTALL_EXAMPLES]/dbus/pingpong
++ INSTALLS += target