Create an ONIX-bot for Bibliometa data-set

[mekarpeles]

References internetarchive/openlibrary#860

In addition to the two bug fixes mentioned up top, there are a whole stack of other things that need to be cleaned up since this code hasn't been touched in 9 years. It may even be the case that it's better to use the current code as a specification and reimplement.

Some of the things which I notice at a glance:

• PEP-8 spaces instead of tabs (Use pycodestyle for this)
• replace Sax with ElementTree or other modern XML access
• replace xmltramp.py with a more modern off-the-shelf XML library
• replace urlcache.py with Requests cache? May be built-in to XML library, so unnecessary
• replace thread_utils.py with modern built-ins
• define a custom exception to raise rather than using Exception
• names are converted to ASCII (ick! perhaps one of the sources of all our broken names)
• importer works directly against a database instead of using the API