Organization categories should have hierarchy

[anselmbradford]

In the database, the "keywords" for a particular organization should be organized to have a hierarchy so it is apparent what are top level categories and subcategories. For instance, a returned JSON string might look like:

"categories":{"children":
[
{"id":"6","name":"Clinic","children":
[
{"id":"7","name":"Dental Clinic"},
{"id":"8","name":"Medical Clinic"}
]},
{"id":"0","name":"Food","children":
[
{"id":"1","name":"Food Pantry","children":
[
{"id":"3","name":"Hot Meal"},
{"id":"4","name":"Soup Kitchen"}
]},
{"id":"2","name":"Food Bank"}
]},
{"id":"5","name":"Shelter"}
]}

And an organization might have the JSON (snippet):

... "category":["0","1","3"] ...

that specifies the ids of the categories its apart of.

[spara]

OK, I'll look at this when I get to organizing the metadata task

[anselmbradford]

@spara Can this issue be closed?

[anselmbradford]

Covered in codeforamerica/ohana-api#45