fixes #625 Git-Tags are not displayed in Shortlog - improved git extraction of git tags if they are associated to a commit - added not implemented tags() function for git changesets
"""Various utilities to work with Python < 2.7.Those utilities may be deleted once ``vcs`` stops support for older Pythonversions."""importsysifsys.version_info>=(2,7):unittest=__import__('unittest')else:unittest=__import__('unittest2')