TUT: added tutorial files (issue #671)

- also cleanup by using 0.orig/ directory.
- use foamListRegions to obtain region names

tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater/Allmesh

@@ -14,6 +14,7 @@ runApplication splitMeshRegions -cellZones -overwrite
 for region in $(foamListRegions solid)
 do
     rm -f 0/$region/{nut,alphat,epsilon,k,U,p_rgh}
+    rm -f processor*/0/$region/{nut,alphat,epsilon,k,U,p_rgh}
 done
 
 for region in $(foamListRegions)