reorganizing the code

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

src/tactic/arith_tactics/factor_tactic.h

@@ -0,0 +1,28 @@
+/*++
+Copyright (c) 2012 Microsoft Corporation
+
+Module Name:
+
+    factor_tactic.h
+
+Abstract:
+
+    Polynomial factorization tactic.
+
+Author:
+
+    Leonardo de Moura (leonardo) 2012-02-03
+
+Revision History:
+
+--*/
+#ifndef _FACTOR_TACTIC_H_
+#define _FACTOR_TACTIC_H_
+
+#include"params.h"
+class ast_manager;
+class tactic;
+
+tactic * mk_factor_tactic(ast_manager & m, params_ref const & p = params_ref());
+
+#endif