Added Flake8 lib and fixed PEP8 violations

utils/fields.py

@@ -1,6 +1,5 @@
 from django.utils.translation import ugettext as _
 from django.db import models
-from django import forms
 
 # http://xml.coverpages.org/country3166.html
 COUNTRIES = (
@@ -255,4 +254,4 @@ class CountryField(models.CharField):
         super(CountryField, self).__init__(*args, **kwargs)
 
     def get_internal_type(self):
-        return "CharField"
+        return "CharField"