Preset Cleanups

More consistency in presets.. (re #2332)

* improved some name labels and search terms for clarity
* in general, for fields that have building or area, show:
    `operator`, `address`, `building_area`, `operating_hours` (where this makes sense)
* make `kindergarten`, `school`, `college`, `university` more similar
* show `building_area` for most `craft=*` and `shop=*` (most were this way already)
* remove erroneous `tinsmith` file
* update README
* structure json files like:
    `icon`, `fields`, `geometry`, `terms`, `tags`, `name`  (most json files were this way already)