Various small fixes and also some basic tests for the auth framework

tests.py

@@ -0,0 +1,10 @@
+from auth import DredditAuthBackend
+import unittest
+
+class AuthLogin(unittest.TestCase):
+    def setUp(self):
+        self.auth = DredditAuthBackend()
+
+    def testLogin(self):    
+        self.assertEquals(self.auth.authenticate(username='invaliduser', password='asdasd'), None)
+        self.assertTrue(self.auth.authenticate(username='testuser', password='testtest'))