Add amenity/fast_food to default suggestions

Fixes #2446
Add natural=cave_entrance preset

Fixes #2412
Add landuse=garages preset

Fixes #2430
Add amenity=register_office preset

Fixes #2431
Add levels field to building=commercial

Fixes #2454
Add takeaway and delivery fields

Fixes #2483
Add junction=yes preset

Fixes #2484
Add substation type field

Fixes #2486
Merging latest iD
Merge branch 'master' into buildings