TUT: basic, IO, preProcessing, VV: clean up tutorials

- TUT: mesh: add missing SnakeRiverCanyon files
- TUT: mesh: add missing cp source in a foamyHexMesh tutorial

tutorials/verificationAndValidation/atmosphericModels/atmForestStability/Allclean

@@ -5,11 +5,10 @@ cd "${0%/*}" || exit                                # Run from this directory
 
 cleanCase0
 
-rm -f constant/fvOptions
-rm -f constant/turbulenceProperties
-rm -f system/setFieldsDict
+rm -rf 0.orig
+rm -rf system
+rm -rf constant
 rm -rf results
 rm -rf plots
-rm -rf system/atm-Arnqvist-2015
 
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