Added TODO file.

ugly_hacks/santiago/TODO

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+* Service time expiry
+
+- Replies include "this service expires on".
+
+* Search hop expiry.
+
+- Searches are bounced only for a maximum number of cilents
+   (Gnutella-style).
+
+* Add real Unit Testing.
+
+- Spec out the system through test harnesses.  If the tests can run
+   the system, it's complete.
+
+* Message Queuing
+
+- Process a maximum of X MB over Y requests per unit time Z per
+   friend.
+
+- Messages that exceed that maximum are queued for the next time unit.
+
+* Process Separation
+
+- Listeners aren't senders aren't controllers.