made git refs filter configurable ref issue #797 - default --all was kept and --branches --tags (or even other variations) is possible to use via .ini file
"""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')