Add option (possibly only useful for the ETC migration, but maybe useful in general (perhaps if more dials) for normalizing labels according to a scheme where all labels are lowercase, and use hyphens instead of whitespace
Fix typo
Add an option to disable all crossreferences between the original issue and the imported issue.  This effectively makes an issue *copy* rather than migration.  Can be used to copy all issues from one repository to another without maintaining references between the two.
Fix bug with comment import
Enable preserving the original assignee too.