- Reworked login / logout workflow

- Added Facebook Connect tab to login nav
- Show Facebook mini-avatar when logged in
- Added Facebook Connect tab to connect settings nav
- Option to disconnect from Facebook

db/foreign_services.sql

@@ -2,4 +2,5 @@ insert into foreign_service
     (id, name, description, created)
 values
     ('1','Twitter', 'Twitter Micro-blogging service', now()),
-    ('2','Facebook', 'Facebook', now());
+    ('2','Facebook', 'Facebook', now()),
+    ('3','FacebookConnect', 'Facebook Connect', now());