ENH: decomposePar/decomposeParDict: updated for decomposition methods

applications/utilities/parallelProcessing/decomposePar/decomposeParDict

@@ -37,6 +37,7 @@ method          scotch;
 // method          metis;
 // method          manual;
 // method          multiLevel;
+// method          structured;  // does 2D decomposition of structured mesh
 
 multiLevelCoeffs
 {
@@ -108,6 +109,15 @@ manualCoeffs
 }
 
 
+structuredCoeffs
+{
+    // Patches to do 2D decomposition on. Structured mesh only; cells have
+    // to be in 'columns' on top of patches.
+    patches     (bottomPatch);
+}
+
+
+
 //// Is the case distributed
 //distributed     yes;
 //// Per slave (so nProcs-1 entries) the directory above the case.