Begain fixing grids and histograms

regtest/adjmat/rt-dfg-wcsurf/gas-one.xyz

regtest/adjmat/rt-dfg-wcsurf/plumed.dat

regtest/crystallization/rt-wcsurface/atoms.xyz.reference

regtest/crystallization/rt-wcsurface/plumed.dat

regtest/crystallization/rt-wcsurface/traj-1frame.xyz

regtest/crystallization/rt-wcsurface2/plumed.dat

regtest/multicolvar/rt-dens-average/dens1.reference

regtest/multicolvar/rt-dens-average/dens5.reference

regtest/multicolvar/rt-dens-average/dens5a.reference

regtest/multicolvar/rt-dens-average/interpol.reference

regtest/multicolvar/rt-dens-average/plumed.dat

regtest/multicolvar/rt-dens/dens2.reference

regtest/multicolvar/rt-dens/dens5.reference

regtest/multicolvar/rt-dens/interpol.reference

regtest/multicolvar/rt-dens/plumed.dat

src/core/ActionPilot.cpp

src/gridtools/ActionWithInputGrid.cpp

src/gridtools/ActionWithInputGrid.h

src/gridtools/ConvertToFES.cpp

src/gridtools/DumpCube.cpp