add script to fix missing concordances

[missinglink]

Added a script which will fix missing properties in wof:concordances as per pelias/whosonfirst#527

wof git clone --strategy=shallow whosonfirst-data-admin-sg /tmp/sg

wof git export /tmp/sg \
  | wof feature fix --concordances \
  | wof fs import --exportify /tmp/sg/data

note: the commands above require the latest version of wof installed with shell dependencies and a local copy of the docker-whosonfirst-exportify image on your system.

related: whosonfirst-data/whosonfirst-data#1956

[missinglink]

cat berlin.geojson | jq '.properties["wof:concordances"]'
{
  "gp:id": 667027,
  "wd:id": "Q64"
}

cat berlin.geojson | wof feature fix --concordances | jq '.properties["wof:concordances"]'
{
  "gp:id": 667027,
  "wd:id": "Q64",
  "gn:id": 6547383,
  "qs:id": 630199
}