Merge branch 'feature/multiplexer' into 'master'

CMakeLists.txt

applications/calibration-multi/CMakeLists.txt

applications/calibration-multi/src/main.cpp

applications/calibration/src/lens.cpp

applications/ftl2mkv/src/main.cpp

applications/groupview/src/main.cpp

applications/gui/CMakeLists.txt

applications/gui/src/camera.cpp

applications/gui/src/camera.hpp

applications/gui/src/main.cpp

applications/gui/src/media_panel.cpp

applications/gui/src/media_panel.hpp

applications/gui/src/record_window.cpp

applications/gui/src/scene.hpp

applications/gui/src/screen.cpp

applications/gui/src/src_window.cpp

applications/gui/src/src_window.hpp

applications/gui/src/thumbview.cpp

applications/reconstruct/CMakeLists.txt

applications/reconstruct/src/main.cpp