apneadiving/Google-Maps-for-Rails — pull request #376 by JamesChevalier (2013-09-22 18:29:11+00:00)
Title: add the ability to addPolylines (like addMarkers)

I've effectively duplicated addMarkers for Polylines.
The main difference between replacePolylines and addPolylines is that @destroy_polylines() is not called.
This also includes the ability to optionally call @adjustMapToBounds().