Revert "Remove unused _get_config_user helper."

This reverts commit 55373c5da9df65c2b60836522116272773d23b2a.
Revert "Simplify tag_list function."

This reverts commit 7057eb8b349083d40d3c6f7c8348c3cb079ac157.
Merge branch 'master' of github.com:rabbitvcs/rabbitvcs
Merge branch 'master' of github.com:rabbitvcs/rabbitvcs

Conflicts:
	rabbitvcs/vcs/git/gittyup/client.py