Fixed an inconsistency in the definition of the thermal conductivity
Patches to support compression of dumbells
Fixed compression of dumbbells
Removed a spurious error in the test suite
Trying to add a polar/nematic order parameter for Franscesco
Added a patch to fix the calculation of the Nematic order parameter
Starting the tiff implementation
Added stacked TIFF loading to coilvol, and corrected the gradient calculation for volume data sets