Additional improvements for OFN output

[cthoyt]

1. It seems like the debio issue is getting closer to being solved, but somehow the chemrof predicates seem to work where the debio ones don't for InChI and SMILES. debio predicates also seem to work in the miRBase exporter when used for object properties.
2. Skip more bad IDs from BiGG
3. Output oboInOWL to OFN if auto-generated-by is used, but not in OBO since it's builtin