Fix extent

This solves #554
Move rendering of miniroundabouts to z16

This solves #598.
Also fix mercator extents
Add a SVG icon for supermarkets
Add a shop_convenience SVG icon

Like supermarket, it features bars
Switch to SVG for clothes icon
Switch to SVG for car shop icon
Remove unused xlink
Whitespace cleanup
Reduce car height and widen wheelbase
stop rendering landuse=greenfield

it was misleadingly rendered like construction area
Expand shapefile paths when unzipping

Explicitly listing the shapefile paths avoids the need for bash.

This fixes #653 in a different way than #666, but they don't conflict.
Merge branch 'master' into icons_shop

Conflicts:
	amenity-points.mss
Straighten car roof sides, curve corners
Merge branch 'pnorman-icons_shop'
Merge pull request #669 from pnorman/sh_shapefiles

Expand shapefile paths when unzipping
Remove old TODO file - everything is in issues nowadays.
Merge branch 'greenfield' of https://github.com/mkoniecz/openstreetmap-carto into mkoniecz-greenfield
Merge branch 'mkoniecz-greenfield'
Merge pull request #637 from math1985/miniroundabout-minzoom

Move rendering of miniroundabouts to z16