v1.2.1

NEW FEATURES

• Add 'check_ba_models'
• Add 'check_mhc'
• Add 'check_mhc_class'
• Add 'check_mhcnuggets_url'
• Add 'check_mhcnuggetsr_folder'
• Add 'check_verbose'
• Add 'mhcnuggets_options_to_text'
• Follow new MHCnuggets file structure

MINOR IMPROVEMENTS

• None

BUG FIXES

• None

DEPRECATED AND DEFUNCT

• downgrade_pip, install_mhcnuggets,
  install_pip, set_is_mhcnuggets_installed,
  set_pip_version,
  uninstall_mhcnuggets uninstall_pip,
  upgrade_pip are deprecated,
  as these violated CRAN policy.
  The deprecation message will point users to the non-official
  mhcnuggetsrinstall package
  at https://github.com/richelbilderbeek/mhcnuggetsrinstall