gravitystorm/openstreetmap-carto — pull request #178 by math1985 (2013-09-20 00:23:31+00:00)
Title:  Merge layers of bridges (for each osm-layer)

For each osm-layer, we merge the directions layer of bridges into the general layer of bridges.
This is done in preparation for removing the duplication of bridge layers for each osm-layer.

This does not affect rendering.