BUG: resolve some decomposeParDict problems (issues #60, #265).

- Cleanup/centralize handling of -decomposeParDict by relocating
  common code into argList. Ensures that all processes receive
  identical information about the -decomposeParDict opton.

- Only use alternative decomposeParDict for simpleFoam/motorBike
  tutorial so that this will be included in the test loop for snappy.

- Added Mattijs' fix for surfaceRedistributePar.

applications/utilities/parallelProcessing/decomposePar/decomposePar.C

@@ -211,14 +211,7 @@ int main(int argc, char *argv[])
 
     // Allow override of decomposeParDict location
     fileName decompDictFile;
-    if (args.optionReadIfPresent("decomposeParDict", decompDictFile))
-    {
-        if (isDir(decompDictFile))
-        {
-            decompDictFile = decompDictFile/"decomposeParDict";
-        }
-    }
-
+    args.optionReadIfPresent("decomposeParDict", decompDictFile);
 
     wordList regionNames;
     wordList regionDirs;
@@ -301,7 +294,6 @@ int main(int argc, char *argv[])
                     ),
                     decompDictFile
                 )
-
             ).lookup("numberOfSubdomains")
         );