Add missing docstrings

profiles/models.py

@@ -1,3 +1,12 @@
+"""
+A django module that defines a profile, and all the information that can be
+stored in a profile.
+It stores interests, technical information such as the browser fingerprint,
+the preferred search engin, and if the user is likely to directly use urls
+or to type in the search engine.
+"""
+
+import random
 from django.db import models
 
 
@@ -23,6 +32,7 @@ class Keyword(models.Model):
 
 
 class Webpage(models.Model):
+    ''' A webpage url '''
     url = models.URLField()
 
     def __str__(self):