Merge pull request #63 from andymcc/master

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Merge pull request #64 from andymcc/master

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Merge pull request #65 from andymcc/master

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syncdns: make config path optional, update docstring
Merge pull request #66 from hughsaunders/master

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Merge pull request #67 from andymcc/master

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allow rsync-based pushes
Merge pull request #68 from rpedde/master

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Merge pull request #69 from andymcc/master

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