ENH: add auto-detect 0/ to foamCleanTutorials

- in the 'auto' mode (now the default), it will use cleanCase and also
  remove the 0/ directory if a 0.orig/ directory also exists.

  This corresponds to a frequent idiom and can be used quite safely
  for most cases.

ENH: add -serial / -parallel preference for foamRunTutorials

bin/foamTestTutorial

@@ -76,7 +76,14 @@ optRunLimit=1
 while [ "$#" -gt 0 ]
 do
     case "$1" in
-    -h* | -help*)   printHelp ;;
+    (- | --)
+        shift
+        break   # Stop option parsing
+        ;;
+
+    (-h* | -help* | --help*)
+        printHelp
+        ;;
 
     -force)
         optForce=true
@@ -102,10 +109,6 @@ do
         outputDir="${1#*=}"
         ;;
 
-    --)
-        break
-        ;;
-
     -*)
         die "unknown option $1"
         ;;