Fix specifier authorities and other bugs in Regnum to Phyx generation

[gaurav]

This PR fixes a few bugs in Regnum to Phyx generation:

• Fixed a bug that caused specifier taxon name to miss authority names (e.g. "Mus musculus 1758" instead of "Mus musculus Linnaeus, 1758"). I wrote a script to fix malformed specifiers in existing Phyx files.
• Added a script to generate OWL files from Phyx files hadn't been previously checked in. I've checked it in here under a scripts/ directory that is specifically excluded from encryption.
• Changed the default number of digits in Regnum ID filenames from 6 to 7, which is the number of digits used by CDAO and UBERON ontologies. This is also configurable by command line argument now.