added 'conversion' library

 * started with polyDualMesh, but add mesh reader/writers in the future

applications/utilities/mesh/conversion/polyDualMesh/Make/files

-polyDualMesh.C
 polyDualMeshApp.C
 
 EXE = $(FOAM_APPBIN)/polyDualMesh

applications/utilities/mesh/conversion/polyDualMesh/Make/options

 EXE_INC = \
-    -I$(LIB_SRC)/meshTools/lnInclude
+    -I$(LIB_SRC)/meshTools/lnInclude \
+    -I$(LIB_SRC)/conversion/lnInclude
 
 EXE_LIBS = \
-    -lmeshTools
+    -lmeshTools -lconversion

src/Allwmake

@@ -31,6 +31,7 @@ wmake libso randomProcesses
 ( cd turbulenceModels && ./Allwmake )
 ( cd lagrangian && ./Allwmake )
 ( cd postProcessing && ./Allwmake )
+( cd conversion && ./Allwmake )
 
 wmake libso autoMesh
 wmake libso errorEstimation

src/conversion/Allwmake

+#!/bin/sh
+set -x
+
+wmake libso

src/conversion/Make/files

+polyDualMesh/polyDualMesh.C
+
+LIB = $(FOAM_LIBBIN)/libconversion

src/conversion/Make/options

+EXE_INC = \
+    -I$(LIB_SRC)/meshTools/lnInclude
+
+LIB_LIBS = \
+    -lmeshTools