Merge branch 'documentation-writing-week' into 'master'

include/animation.h

include/autoCalib.h

include/backgroundFilter.h

include/calibFilter.h

include/extrCalibration.h

include/filter.h

include/helper.h

include/player.h

include/tracker.h

src/animation.cpp

src/autoCalib.cpp

src/backgroundFilter.cpp

src/backgroundItem.cpp

src/calibFilter.cpp

src/codeMarkerItem.cpp

src/codeMarkerWidget.cpp

src/colorMarkerItem.cpp

src/colorMarkerWidget.cpp

src/colorPlot.cpp

src/coordItem.cpp