Added ExitSign
Refactored EdgeInfo
attempt to make a circle build work
Merge branch 'master' of https://github.com/valhalla/baldr into gdg
try to get latest zmq as we'll need it at some point
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was missing init of classification
Merge pull request #4 from valhalla/additional_tags_gk

was missing init of classification
Merge pull request #3 from valhalla/dwn

Add some fields to nodeinfo
Merge pull request #2 from valhalla/gdg

Added ExitSign and Refactored EdgeInfo
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