added geo module, with region supporting gis data

companies/models.py

@@ -34,7 +34,7 @@ class Company(models.Model):
     shop_rss_feed = models.URLField('RSS tienda online', null=True, blank=True)
     sale_terms = models.TextField('Condiciones de venta', null=True, blank=True)
     shipping_cost = models.DecimalField('Gastos de envío', max_digits=10, decimal_places=2, null=True, blank=True)
-    # tags
+    # tags = models.ManyToMany(Tag, null=True)
     sync = models.BooleanField('Sincronizar tienda', default=False, null=True, blank=True)
 
     # internal