Fix pytest-runner not understanding 'norecursedirs'

As discussed here
https://github.com/pytest-dev/pytest-runner/issues/7
and sort of
https://github.com/pytest-dev/pytest/issues/567

pytest.ini

@@ -0,0 +1,2 @@
+[pytest]
+norecursedirs = lib 

setup.cfg

@@ -1,6 +1,4 @@
 [bdist_wheel]
 python-tag = py34
-[pytest]
-norecursedirs = lib 
 [aliases]
 test=pytest