NOTICK - Fix namespace allocation for C++ Serialiser

Now things are working for the most part, move the readers into their
own internal namespace. Also start creating an actual separation of the
interface and the implementation with some Interface classes at the
non internal level.

experimental/cpp-serializer/include/amqp/schema/ISchema.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "types.h"
+
+#include "amqp/AMQPDescribed.h"
+
+namespace amqp::schema {
+
+    template <class Iterator>
+    class ISchema {
+        public :
+            virtual Iterator fromType (const std::string &) const = 0;
+            virtual Iterator fromDescriptor (const std::string &) const = 0;
+    };
+
+}