updated DebugSwitches, surfaceWriter

- added obj surfaceWriter
- don't bother with prepended field names on obj and stl surfaceWriter.
  It fills the disk and suggests differences where there are none.

tutorials/stressAnalysis/solidDisplacementFoam/plateHole/system/sampleDict

@@ -19,9 +19,19 @@ interpolationScheme cellPoint;
 
 setFormat       raw;
 
-sets            ( leftPatch { type uniform ; axis y ; start ( 0 0.5 0.25 ) ; end ( 0 2 0.25 ) ; nPoints 100 ; } );
+sets
+(
+    leftPatch
+    {
+        type    uniform;
+        axis    y;
+        start   ( 0 0.5 0.25 );
+        end     ( 0 2 0.25 );
+        nPoints 100;
+    }
+);
 
-surfaces        ( );
+surfaces        ();
 
 fields          ( sigmaxx );