revamp and simplify swig support, force typed enums for C# and Java for all except the constraint_solver/routing module; port examples; Fix SAT on very large problems

ortools/sat/python/sat.i

@@ -13,7 +13,7 @@
 
 // This .i file exposes the sat cp_model API.
 
-%include <stdint.i>
+%include "stdint.i"
 
 %include "ortools/base/base.i"
 %include "ortools/util/python/proto.i"
@@ -32,7 +32,6 @@ typedef uint64_t uint64;
 
 %module(directors="1") operations_research_sat
 
-
 PY_PROTO_TYPEMAP(ortools.sat.cp_model_pb2,
                  CpModelProto,
                  operations_research::sat::CpModelProto);
@@ -92,3 +91,4 @@ PY_PROTO_TYPEMAP(ortools.sat.sat_parameters_pb2,
 %include "ortools/sat/swig_helper.h"
 
 %unignoreall
+