ENH: complete reworking of foamToEnsight to make into a library (issue #241)

- eliminate ensightAsciiStream, ensightBinaryStream, ensightStream in
  favour of using ensightFile and ensightGeoFile classes throughout.

- encapsulate mesh-parts sorting with the ensightCells, ensightFaces
  class.

- handle of patches/faceZones entirely within ensightMesh for a lighter
  interaction with field output. Both faceZones and point fields need
  more testing to see if they behave properly for all cases.

- move some output functionality into its own namespace
  'ensightOutput', move into a library.

- use the ensightCase class to open new ensight output streams
  in the proper sub-directory locations.

applications/utilities/postProcessing/dataConversion/foamToEnsight/Make/options

@@ -3,14 +3,12 @@ EXE_INC = \
     -I$(LIB_SRC)/meshTools/lnInclude \
     -I$(LIB_SRC)/dynamicMesh/lnInclude \
     -I$(LIB_SRC)/fileFormats/lnInclude \
-    -I$(LIB_SRC)/sampling/lnInclude \
     -I$(LIB_SRC)/lagrangian/basic/lnInclude \
     -I$(LIB_SRC)/conversion/lnInclude
 
 EXE_LIBS = \
     -ldynamicMesh \
     -lfileFormats \
-    -lsampling \
     -lgenericPatchFields \
     -llagrangian \
     -lconversion