+ new positioning method in cartesian coordinates:
       w = u x v where u = (128,1) - (1,1)
                       v = (1,128) - (1,1)
       comment: this differs from Must2 positioning scheme 
                where w = v x u
   + this ensures a full consistency between simulations
     and analysis when GaspardTrackerDummyShape is positioned
     at the *same* place with cartesion or spherical coordinates
   + this was checked with a GaspardTrackerDummyShape module at
     R = 100, THETA = 180 and PHI = 0

* Add support in NPA for GaspardTrackerSquare shape
   + same changes as for GaspardTrackerDummyShape both in NPS
     and NPA
   + full consistency is achieved when GaspardTrackerModule are 
     positioned at the *same* place with cartesian or spherical 
     coordinates
   + this was checked with the barrel of the gaspHyde geometry

* Misc:
   + remove compilation warnings in ParisCluster
   + begin work on GaspardTrackerTrapezoid (NPS + NPA)