Revision control

++ QT += widgets concurrent
++
++ HEADERS += \
++ mainwindow.h \
++ vulkanwindow.h \
++ renderer.h \
++ mesh.h \
++ shader.h \
++ camera.h
++
++ SOURCES += \
++ main.cpp \
++ mainwindow.cpp \
++ vulkanwindow.cpp \
++ renderer.cpp \
++ mesh.cpp \
++ shader.cpp \
++ camera.cpp
++
++ RESOURCES += hellovulkancubes.qrc
++
++ # install
++ target.path = $$[QT_INSTALL_EXAMPLES]/vulkan/hellovulkancubes
++ INSTALLS += target