[PATCH] Ability to automaticaly push tags to remote repositories.

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- From `cg-push --long-help`:

- -t TAG::
        Tells cg-push to also push the given tag. Note that in the
        future, cg-push should push tags automatically. Also note
        that even if you pass `cg-push` the '-t' arguments, your
        HEAD is still pushed as well in addition to the tags.

One of possible ways of doing it is in attached patch. Comments,
suggestions?

- --
Krzysiek Pawlik (Nelchael)
RLU #322999 GPG Key ID: 0xBC555551
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