How is [wahlflo/GitIndexFileParser](https://github.com/wahlflo/GitIndexFileParser) related to [sbp/gin](https://github.com/sbp/gin)? The files [GitIndexFileParser/git_index_parser/parser.py](https://github.com/wahlflo/GitIndexFileParser/blob/57ffc56fa1402b2c52f65c90d2034c8ad2ab7a2f/git_index_parser/parser.py) and [sbp/gin/gin](https://github.com/sbp/gin/blob/1b12d8463f3261d57ef5ea565bd644ea731d9f1a/gin) have many common lines of code and even common comments. Is [wahlflo/GitIndexFileParser](https://github.com/wahlflo/GitIndexFileParser) based on or a further development of [sbp/gin](https://github.com/sbp/gin)? Please clarify the authorship and the license issues.