Introduce a helper function for versioning

The `version_helper` function should make version changes simpler, upon
a release simple bump `__version__` and change `__release__` to `True`,
afterwards change `__release__` back to `False`. It also tries to call
`git describe` so `ranger --version` reports a commit hash if available.

This should prevent slip-ups where released versions report ambiguously
as being `ranger-master x.y.z` which is what we use for non-release
versions.

Fixes #1197, which was a misunderstanding caused by a slip-up.

0 files changed, 0 insertions, 0 deletions