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RELEASE NOTES
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* The flag parsing issues of git-flow subcommands are solved for most
platforms.
* `git flow {feature,hotfix,release} finish` now takes a `-k` flag, to keep the
branch around after finishing.
* `git flow release finish` takes a `-n` flag, to skip tagging.
* For consistency, `git flow {release,hotfix}` now, too, have a `publish` and
`track` subcommand, just like `feature`.
* Various minor fixes.