CodeGenKranc.m: Add comments
CodeGenKranc.m:  Use AssignVariableFromExpression where possible in InitialiseFDVariables
CodeGenKranc.m: Remove unused declareGridLoopVariables
CodeGenKranc.m: Remove unused InitialiseGridLoopVariables
CodeGenKranc.m: Tidy up GenericGridLoop function
CodeGenKranc.m: Remove source language conditional from ReplacePowers
Rename ReplacePowers as ProcessExpression as this is a more accurate name
MathematicaCompat.h: Remove Fortran support
CodeGenKranc.m: Remove unused GridName function
CodeGenKranc.m:  Remove Fortran support from ArrayName
Move details of vectorisation capabilities and include files into Vectorisation.m