Merge pull request #12 from valhalla/kk_loki

graphreader hooks for loki to get tile from ll
GetStreetNameOffset update
Merge branch 'master' of https://github.com/valhalla/baldr into gdg
Changed to use [] op
Merge pull request #13 from valhalla/gdg

 GetStreetNameOffset update
Merge remote-tracking branch 'origin/master' into kk_loki