1.6.0

Released on: May 27, 2019

• Renamed top-level directive #!mode options to scannerless (default)
  and scanner.
• !language-directive allows for identifier as language parameter.
• Removed deprecated directives #parser, #description, #copyright
  and #version.
• Removed old-style !model top-level directive.
• Several internal code revisions.
• Compiled and linked against libphorward 0.24.