The version is extracted from “relase/” tags and they exists only on EOLE
git repository.
* Makefile (install): Depends on version file.
(version.in): Fake dev version for developpers without devel release
tags
* setup.py: Add missing subprocess import.
(fetch_version): Use same fallback version as Makefile.
The version is extracted from the last tag name minus the 'release/'
prefix.
* AUTHORS: Add mysel as contributor.
* setup.py: Add a function to get version from extracted version.in file
or from the last tag name.
* Makefile: Add a target to generate the version.in file from the last
tag name.
* .gitignore: Ignore the version.in file.
