Clean also doc/examples/.

Author: RKrahl

Makefile

@@ -30,8 +30,8 @@ clean:
 distclean: clean
 	rm -rf .cache
 	rm -f MANIFEST
-	rm -f *.pyc tests/*.pyc
-	rm -rf __pycache__ tests/__pycache__
+	rm -f *.pyc tests/*.pyc doc/examples/*.pyc
+	rm -rf __pycache__ tests/__pycache__ doc/examples/__pycache__
 	rm -rf dist
 	rm -rf pytest_dependency.egg-info
 	rm -f python2_6.patch