update chapter about granulometry

imGranulometry: add imOrientedGranulo.m for orientation granulometry

Slicer: rename menu item

imStacks/readstack.m: fix import of TIF images saved with ImageJ larg…

…er than 4GB

imMeasures/imInscribedCircle.m: takes into account spatial calibration

imStacks: cleanup image reading functions

Slicer: keep calibration and settings when image is crop