Merge branch '15-fix-warnings' into 'master'

CMakeLists.txt

include/analysePlot.h

include/aviFileWriter.h

include/codeMarkerWidget.h

include/colorMarkerWidget.h

include/control.h

include/ellipse.h

include/helper.h

include/multiColorMarkerWidget.h

include/stereoContext.h

include/tracker.h

include/trackerReal.h

include/vector.h

include/view.h

src/analysePlot.cpp

src/animation.cpp

src/autoCalib.cpp

src/aviFileWriter.cpp

src/backgroundFilter.cpp

src/backgroundItem.cpp