XMLReader implementation and a virtual Reader/Writer template framework.

Test_serialisation has an example of *code* *free* object serialisation
to both ostream and to XML using macro magic.

Implementing TextReader/TextWriter, YAML, JSON etc.. should be trivial
and we can use configure time options to select the default "Reader" typedef.

Present done with

"using XMLPolicy::Reader"

to pick up the default serialisation strategy.

lib/Grid.h

@@ -30,7 +30,7 @@
 ///////////////////
 // Grid headers
 ///////////////////
-#include <MacroMagic.h>
+#include <Serialisation.h>
 #include <Config.h>
 #include <Timer.h>
 #include <Log.h>