Update shrunk_client.py
Update shrunk_client.py

This completes a first draft of the basic API functions for db.ShrunkClient. It
will need testing.

An important missing feature is the short URL generation; the random strings of
letters and numbers are merely for testing purposes at this point.

ksuarz/shrunk,oss/shrunk,oss/shrunk,ksuarz/shrunk,ksuarz/shrunk,ksuarz/shrunk,oss/shrunk,oss/shrunk,oss/shrunk