Added policy checks (#10).

tox.ini

@@ -111,13 +111,15 @@ disable =
         line-too-long,
         missing-docstring,
         mixed-indentation,
+        no-else-raise,
         no-else-return,
         too-complex,
+        too-many-boolean-expressions,
         too-many-branches,
         too-many-instance-attributes,
         too-many-lines,
         too-many-locals,
-        too-many-boolean-expressions
+        too-many-statements
 max-complexity = 15
 max-args = 8
 max-locals = 20
@@ -137,4 +139,8 @@ max-module-lines = 2500
 [flake8]
 ignore =
 	E241,  # multiple spaces after operator; should be kept for tabular data
+        E303,  # too many blank lines
 	E501,  # line too long
+
+[pytest]
+junit_family = xunit1