Gitman

- **BREAKING**: Dropped support for Python 3.5.
- Added `git svn` support. (daniel-brosche)
- Added `$GITMAN_CACHE_DISABLE` to disable repository mirrors. (daniel-brosche)
- Added `--skip-changes` option to skip changed dependencies on install or update command. (daniel-brosche)

- **BREAKING**: Removed confusing `--lock` option on `update` command in favor of just using the `lock` command.
- **BREAKING**: Renamed `--no-lock` to `--skip-lock` on `update` command.
- **BREAKING**: Renamed `--no-dirty` to `--fail-if-dirty` on `list` command.
- Added `--keep-location` option on `uninstall`. (DavidWatkins)
- Added feature to enable sparse checkouts. See the docs for further information. (xenji)

- Allow config files to exist in subdirectories of the main project.
- Added `$GITMAN_CACHE` to customize the repository cache location.

- Added `init` command to generate sample config files.
- Added support for post-install scripts on dependencies.
- Updated config format to support `null` for links.

- Added preliminary Windows support. (StudioEtrange)

- Added coloring to the command-line output.
- Fixed issue where `<dirty>` could be saved as a locked revision.