Cleaning and refactoring Frame classes

JPSvis.pro

src/Frame.cpp

src/Frame.h

src/FrameElement.cpp

src/FrameElement.h

src/MainWindow.cpp

src/Pedestrian.cpp

src/SaxParser.cpp

src/SaxParser.h

src/ThreadDataTransfert.cpp

src/ThreadVisualisation.cpp

src/ThreadVisualisation.h

src/TimerCallback.cpp

src/TimerCallback.h

src/extern_var.h