Re #7953. Using SetSampleMaterial to clarify things.
Re #7953. Adding more logging and fixing but in absorptionXS get.
Re #7953. Quieting compiler warning.
Re #7953. Changed variable name to reflect actual value.
Re #7953. Made MultScatt... event aware.
Re #7953. Moved implementation from header to source.
Re #7953. Added in progress bar reporting.
Merge branch 'feature/7953_MultipleScatteringCylinderAbsorption' into develop