Add display fields for billing

This is here to allow graceful limits.
Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/billing/migrations/0006_auto_20160106_1834.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.9 on 2016-01-06 18:34
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('billing', '0005_billing_trial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='plan',
+            name='display_limit_languages',
+            field=models.IntegerField(default=0),
+        ),
+        migrations.AddField(
+            model_name='plan',
+            name='display_limit_projects',
+            field=models.IntegerField(default=0),
+        ),
+        migrations.AddField(
+            model_name='plan',
+            name='display_limit_repositories',
+            field=models.IntegerField(default=0),
+        ),
+        migrations.AddField(
+            model_name='plan',
+            name='display_limit_strings',
+            field=models.IntegerField(default=0),
+        ),
+    ]

weblate/billing/models.py

@@ -34,9 +34,13 @@ class Plan(models.Model):
     price = models.IntegerField(default=0)
     yearly_price = models.IntegerField(default=0)
     limit_strings = models.IntegerField(default=0)
+    display_limit_strings = models.IntegerField(default=0)
     limit_languages = models.IntegerField(default=0)
+    display_limit_languages = models.IntegerField(default=0)
     limit_repositories = models.IntegerField(default=0)
+    display_limit_repositories = models.IntegerField(default=0)
     limit_projects = models.IntegerField(default=0)
+    display_limit_projects = models.IntegerField(default=0)
 
     class Meta(object):
         ordering = ['price']