Avoid spurious failures of t422.py.  Could it really be that different coprocessors will occasionally cause this test to fail even on the same machine?
Modify the urllib from web cat's branch so that it works with a simple synchronous xmlhttprequest object.
Merge branch 'master' of github.com:rixner/skulpt into rixner-master
Add an external configuration variable Sk.inputfun.  This can be configured similar to the Sk.read variable for importing files.  It is backward compatible with the current practice of using prompt.