merging to create tag 0.5-alpha2

JPSvis.pro

forms/mainwindow.ui

forms/settings.ui

src/Frame.cpp

src/Frame.h

src/FrameElement.cpp

src/FrameElement.h

src/MainWindow.cpp

src/MainWindow.h

src/Pedestrian.cpp

src/SaxParser.cpp

src/SaxParser.h

src/SystemSettings.cpp

src/SystemSettings.h

src/ThreadDataTransfert.cpp

src/ThreadDataTransfert.h

src/ThreadVisualisation.cpp

src/ThreadVisualisation.h

src/TimerCallback.cpp

src/TimerCallback.h