---------- Visual Tracking UI QT --------------

-->mainwindow.ui: some changes in ui

-->mainwindow.cpp & mainwindow.h: defined required function to adquire ui information and seting up Position Manager

-->ImageManager.cpp: corrected an error while testing 1 camera (previously an error rise saying that camera 2 is not prepared)

-->PositionManager.cpp: added constructor and deconstructor, added configure cams (init basic information), changed camera objects to pointers to camera objects

-->InfoCollector.cpp & InfoCollector.h: added functions to set up  Position Manger

--> ObjectGeo.cpp, ObjectGeo.h, Camera.cpp & Camera.h: some changes to adapt them to the current application pipeline.