v2.3.0

Changed:

• layout of --help, #411
• OcrdMets: Removing the last file for a physical page will remove the physical page

Fixed:

• mets_basename was not respected in ocrd workspace init, #415, #417
• typos, #414

Added:

• OcrdMets.remove_physical_page to remove structMap[@TYPE="physical"] entries
• ocrd validate CLI to validate task groups, PAGE XML and processor parameters, #245, #384