do-release-tags: Add remote pull option#6

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ajodock wants to merge 3 commits intoostreedev:masterfrom

ajodock:feature/remote-pull

Commits on Jan 9, 2017

do-release-tags: Add remote pull option
ajodock
committed

Commits on Jan 18, 2017

do-release-tags: Fix help text for remote argument.
ajodock
committed
do-release-tags: Do explicit lookup of commit instead of catching exception.
ajodock
committed