Add the file COPYRIGHT, the CeCILL license's text, and update the source files' headers with the copyright and license information.
Code moved from InputLogCSV.
In Measurement, the SSs are now stored in a map (instead of a vector), along with their packet IDs.
To be consistent with the other modules, the positioning server must be called OwlPS Positioner instead of Positioning, and the executable owlps-positionerd (even if the daemon mode is not implemented yet). That's a big commit for a tiny change.