separate the gomory cut functionality in a separate file

Signed-off-by: Lev <levnach@hotmail.com>

src/util/lp/gomory.h

@@ -0,0 +1,36 @@
+/*++
+Copyright (c) 2017 Microsoft Corporation
+
+Module Name:
+
+    <name>
+
+Abstract:
+
+    <abstract>
+
+Author:
+    Nikolaj Bjorner (nbjorner)
+    Lev Nachmanson (levnach)
+
+Revision History:
+
+
+--*/
+#pragma once
+#include "util/lp/lar_term.h"
+#include "util/lp/lia_move.h"
+#include "util/lp/explanation.h"
+#include "util/lp/static_matrix.h"
+
+namespace lp {
+class int_solver;
+class gomory {
+    class imp;
+    imp                  *m_imp;
+public :
+    gomory(lar_term & t, mpq & k, explanation& ex, unsigned basic_inf_int_j, const row_strip<mpq>& row, const int_solver& s);
+    lia_move create_cut();
+    ~gomory();
+};
+}