OpenFOAM field reading: Automated the handling of <field>.orig files

Now if a <field> file does not exist first the compressed <field>.gz file is
searched for and if that also does not exist the <field>.orig file is searched
for.

This simplifies case setup and run scripts as now setField for example can read
the <field>.orig file directly and generate the <field> file from it which is
then read by the solver.  Additionally the cleanCase function used by
foamCleanCase and the Allclean scripts automatically removed <field> files if
there is a corresponding <field>.orig file.  So now there is no need for the
Allrun scripts to copy <field>.orig files into <field> or for the Allclean
scripts to explicitly remove them.

tutorials/combustion/fireFoam/LES/flameSpreadWaterSuppressionPanel/Allrun

@@ -33,8 +33,6 @@ rm log.createPatch
 # create actual patches
 runApplication createPatch -region filmRegion -overwrite
 
-cp 0/ph_rgh.orig 0/ph_rgh
-
 # Run
 runApplication `getApplication`
 

tutorials/combustion/fireFoam/LES/oppositeBurningPanels/Allrun

@@ -26,8 +26,6 @@ runApplication -s fBurner \
 
 runApplication createPatch -overwrite
 
-cp 0/ph_rgh.orig 0/ph_rgh
-
 runApplication -s master \
     decomposePar -force
 

tutorials/combustion/fireFoam/LES/smallPoolFire2D/Allrun

@@ -8,10 +8,6 @@ cd ${0%/*} || exit 1    # Run from this directory
 runApplication blockMesh
 runApplication topoSet
 runApplication createPatch -overwrite
-
-cp 0/ph_rgh.orig 0/ph_rgh
-
-# Run
 runApplication `getApplication`
 
 #------------------------------------------------------------------------------

tutorials/combustion/fireFoam/LES/smallPoolFire3D/Allrun

@@ -9,12 +9,7 @@ application=`getApplication`
 runApplication blockMesh
 runApplication topoSet
 runApplication createPatch -overwrite
-
-cp 0/ph_rgh.orig 0/ph_rgh
-
 runApplication decomposePar -force
-
-# Run
 runParallel $application
 
 #------------------------------------------------------------------------------

tutorials/combustion/reactingFoam/RAS/DLR_A_LTS/Allrun

@@ -7,9 +7,6 @@ cd ${0%/*} || exit 1    # Run from this directory
 # Set application name
 application=`getApplication`
 
-rm -f 0/T
-cp 0/T.orig 0/T
-
 runApplication chemkinToFoam \
                chemkin/grimech30.dat chemkin/thermo30.dat chemkin/transportProperties \
                constant/reactionsGRI constant/thermo.compressibleGasGRI