Update godelw script to fall back on curl if wget download fails (#18)
Update godelw script to fall back on curl if wget download fails (#18)

If downloading the distribution using wget fails and curl also
exists on the system, attempt the download using curl. Also
adds more details to the error message (including command run)
and more granular progress through the steps.

Fixes #14
palantir/godel,palantir/godel