This commit pairs a camera with a thread. In this way, the
single process can to manage several camera. Every camera
thread create one video capture thread to read its input
stream. Only one camera thread can start the visualization.
This commit fixes the wrong data reading from file of the
read_projection_matrix function.
This commit fixes the wrong orientation mask accessing of
the addRoadUserfromTracker function. In the code there are
two sections to test.
Davide Sapienza
5a1c7fb83d