Remove landuse=wood rendering

landuse=wood used to render the same as natural=wood for fill, but omitted
the name.

landuse=wood has 4.7k uses compared to 1.8 million natural=wood and 2.2 million
landuse=forest.
Fix for crash of get-shapefiles.sh on populated places ogr2ogr cleanup

This fixes issue #121.
Merge pull request #160 from math1985/ogr2ogr

Fix for crash of get-shapefiles.sh on populated places ogr2ogr cleanup
Correct names of layers that have unclear names for historical reaons.

- Rename #roads to #roads-low-zoom
- Rename #minor-roads-casing to #roads-casing
- Rename #minor-roads-fill to #roads-fill
Merge branch 'landuse_wood' of https://github.com/pnorman/openstreetmap-carto
Merge branch 'roadsv1.0' of https://github.com/math1985/openstreetmap-carto
Merge remote-tracking branch 'official/master'