Run 2to3 over the Demo/ directory to shut up parse errors from 2to3 about lingering print statements.
diff --git a/Demo/sockets/unixclient.py b/Demo/sockets/unixclient.py
index fdbcc7a..cdccb84 100644
--- a/Demo/sockets/unixclient.py
+++ b/Demo/sockets/unixclient.py
@@ -9,4 +9,4 @@
 s.send('Hello, world')
 data = s.recv(1024)
 s.close()
-print 'Received', repr(data)
+print('Received', repr(data))