Not all script exceptions are caught and displayed in stderr

[fi7z]

Makes troubleshooting difficult.

Need to collect examples of cases where this happens.

Example code from an issue that is hard to troubleshoot without proper exception logging:

# sample http response handler
def handleHttpResponseReceived(montoyaApi, httpResponseReceived):
    initialRequest = httpResponseRecieved.initiatingRequest()

With exception handling the root cause is shown to be:

name 'httpResponseRecieved' is not defined

But this makes no sense. Need to investigate.