re-organize muz_qe into separate units

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

src/muz/fp/dl_register_engine.h

@@ -0,0 +1,36 @@
+/*++
+Copyright (c) 2013 Microsoft Corporation
+
+Module Name:
+
+    dl_register_engine.h
+
+Abstract:
+
+    Class for creating Datalog engines.
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2013-08-28
+
+Revision History:
+
+--*/
+#ifndef _DL_REGISTER_ENGINE_H_
+#define _DL_REGISTER_ENGINE_H_
+
+#include "dl_context.h"
+
+namespace datalog {
+
+    class register_engine : public register_engine_base {
+        context* m_ctx;
+    public:
+        register_engine();
+        engine_base* mk_engine(DL_ENGINE engine_type);
+        void set_context(context* ctx) { m_ctx = ctx; }
+    };
+
+}
+
+#endif