added pyramid_listing to requiered packages

Pipfile

@@ -0,0 +1,13 @@
+[[source]]
+
+url = "https://pypi.python.org/simple"
+verify_ssl = true
+name = "pypi"
+
+
+[packages]
+
+
+
+[dev-packages]
+

setup.py

@@ -13,6 +13,7 @@ requires = [
     'pyramid >= 1.9a',
     'pyramid_debugtoolbar',
     'pyramid_jinja2',
+    'pyramid_listing',
     'pyramid_retry',
     'pyramid_tm',
     'SQLAlchemy',