Admin geozones: index, create

Modified Geozone factory and seeds to be more complete

config/locales/admin.en.yml

@@ -97,6 +97,7 @@ en:
       admin: Admin menu
       banner: Manage banners
       debate_topics: Debate topics
+      geozones: Manage geozones
       hidden_comments: Hidden comments
       hidden_debates: Hidden debates
       hidden_proposals: Hidden proposals
@@ -267,6 +268,25 @@ en:
         in_evaluation_count: In evaluation
         total_count: Total
         cost_for_geozone: Cost
+    geozones:
+      index:
+        title: Geozone
+        create: Create geozone
+      geozone:
+        name: Name
+        external_code: External code
+        census_code: Census code
+      errors:
+        form:
+          error:
+            one: "prevented this geozone from being saved"
+            other: 'prevented this geozone from being saved'
+      edit:
+        form:
+          submit_button: Save changes
+      new:
+        back: Volver
+        creating: Crear distrito
     stats:
       show:
         stats_title: Stats