add a simple swig example (from the turorial)

Makefile

@@ -0,0 +1,22 @@
+.PHONY: default
+default: all test
+
+.PHONY: all
+all: _test_swig.so
+
+.PHONY: test
+test:
+	python2.7 test_swig_test.py
+
+_test_swig.so: test_swig.o
+	ld -shared test_swig.o test_swig_wrap.o -o _test_swig.so
+
+test_swig.o: test_swig_wrap.c
+	gcc -fpic -c test_swig.c test_swig_wrap.c -I/usr/include/python2.7
+
+test_swig_wrap.c: test_swig.i
+	swig -python $<
+
+.PHONY: clean
+clean:
+	rm -f *.o *.so test_swig_wrap.c *.pyc test_swig.py