gravitystorm/openstreetmap-carto — pull request #275 by math1985 (2013-12-02 03:49:39+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.