#16 evaluation Thied to install hub but failed miserably, so here we go.

Added code for evaluating tracker performance using MOTA and MOTP measurements. For our application i suppose MOTA is the more interesting one. More info about these algorithms are found at: 
http://jivp.eurasipjournals.com/content/pdf/1687-5281-2008-246309.pdf

I also fixed the time stamps in the debug log window.