Merge branch 'feature/gui2' into 'master'

.gitlab-ci.yml

CMakeLists.txt

Doxyfile

SDK/C/src/streams.cpp

applications/calibration-multi/src/main.cpp

applications/calibration-multi/src/multicalibrate.cpp

applications/calibration-multi/src/visibility.hpp

applications/calibration/src/lens.cpp

applications/ftl2mkv/src/main.cpp

applications/gui/src/config_window.cpp

applications/gui/src/config_window.hpp

applications/gui2/CMakeLists.txt

applications/gui2/README.md

applications/gui2/src/inputoutput.cpp

applications/gui2/src/inputoutput.hpp

applications/gui2/src/main.cpp

applications/gui2/src/module.hpp

applications/gui2/src/modules.hpp

applications/gui2/src/modules/addsource.cpp

applications/gui2/src/modules/addsource.hpp