- Update design doc.
- Refactor History API.
- Use FromRevision and IntoCommit traits.
- Add more test cases.
Signed-off-by: Han Xu <keepsimple@gmail.com>
- Add a code browsing test
- Update design doc, mainly Code Browsing and Diff.
- Simplify `Directory`.
- Remove `Tree` and `Forest`, and `SystemType`.
- Use `Rev` in `diff()`.
Signed-off-by: Han Xu <keepsimple@gmail.com>