try to exclude numpydoc from unit test (why would we test those?!)

Author: amueller

Makefile

@@ -34,7 +34,7 @@ inplace:
 test-code: in
 	$(NOSETESTS) -s -v sklearn
 test-sphinxext:
-	$(NOSETESTS) -s -v doc/sphinxext/
+	$(NOSETESTS) -s -v doc/sphinxext/ -e doc/sphinx/numpydoc/*
 test-doc:
 ifeq ($(BITS),64)
 	$(NOSETESTS) -s -v doc/*.rst doc/modules/ doc/datasets/ \