writers/pcr.py: the computation of the grid coordinates has been edited to minimize the numerical approximation of decimal values (bug fix: due to numerical approximations, the previous version changed the area of the output map)
verify_waterregions.py: additional checks to verify the consistency between the water region map and the map of calibrated catchments (improvement)
cutmaps.py: the values of the boundary box can be either positives or negatives (bug fix: the previous version did not work with negative values)