Add file for documenting Unicode generated test files
Add file for documenting Unicode generated test files

Contains information like:
* List of Perl6 script used to update the tests
* Roast Test File's generated
* Version number the test was generated from
* Date we last generated the file
* File header of the test file, in case Unicode updates their test files
  (Unicode's files are all dated).

bitrauser/roast,dogbert17/roast,dogbert17/roast,perl6/roast,bitrauser/roast