Separated IO reader/writers into a proper abstract base,

derived relationship. Have Text/Binary/Xml versions of
Reader & Writer.

Any new Reader/Writer class inheriting the interface can give object serialisation
to any desired format now.

      new file:   lib/serialisation/BaseIO.h
      modified:   lib/serialisation/BinaryIO.h
      modified:   lib/serialisation/Serialisation.h
      modified:   lib/serialisation/TextIO.h
      modified:   lib/serialisation/XmlIO.h

The test uses the Xml, Binary and Text formats as well as cout << Object.

TODO

@@ -1,9 +1,9 @@
-- PseudoFermions
-
 TODO:
 
 => Clean up HMC
 - Link smearing/boundary conds; Policy class based implementation
+* Support different boundary conditions (finite temp, chem. potential ... )
+* Support different fermion representations? 
 - Integrators
   - Force Gradient
   - Multi-timescale looks broken and operating on single timescale for now.
@@ -14,8 +14,6 @@ TODO:
 
 => Lanczos
 
-=> generalise to non-const EE ; likely defer (??)
-
 - Rectangle gauge actions.
   Iwasaki,
   Symanzik,
@@ -24,10 +22,6 @@ TODO:
 - Prepare multigrid for HMC.
   Alternate setup schemes.
 
-* Support different boundary conditions (finite temp, chem. potential ... )
-
-* Support different fermion representations? 
-
 * Parallel io improvements
   - optional parallel MPI2 IO
   - move Plaquette and link trace checks into nersc reader from the Grid_nersc_io.cc test.
@@ -85,6 +79,9 @@ Not sure of status of this -- reverify. Things are working nicely now though.
 
 Done: Cayley, Partial , ContFrac force terms.
 
+DONE
+- PseudoFermions
+=> generalise to non-const EE ; likely defer (??) (NOT DONE)
 Done:
   - TwoFlavour
   - TwoFlavourEvenOdd