blockMesh reader fix, start refactoring of PV3Readers

- apply scaleFactor (eg, mm->m) in PV3 reader - this looks better when
  overlaying with other objects

- stop segfault when paraview exits without deleting readers first

applications/utilities/postProcessing/graphics/PV3Readers/Allwmake

@@ -0,0 +1,16 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # run from this directory
+set -x
+
+if [ -d "$ParaView_DIR" -a -r "$ParaView_DIR" ]
+then
+    case "$ParaView_VERSION" in
+    3*)
+        wmake libso vtkPV3Readers
+        PV3blockMeshReader/Allwmake
+        PV3FoamReader/Allwmake
+    ;;
+    esac
+fi
+
+# ----------------------------------------------------------------- end-of-file