Recipe endpoints, providing pagination support, other enhancements

[Micalobia]

All changes made:

• /nh/recipe and /nh/recipe/{recipe} endpoints have been added. (#20)
• /nh/recipe endpoint can have ?material=item1,item2,..., to filter by materials.
• call_cargo can return an entire query, instead of being limited to 500. (chains &offset queries according to limit)
• Having thumbsize and excludedetails in the same query will no longer raise a 500 error, it instead ignores thumbsize. (#23)*
• thumbsize will no longer raise a 500 error if there isn't an image_url column, it will instead be ignored.
• All endpoints that query a single item (/nh/sea/{sea},/nh/fish/{fish},etc) now have a query limit of 1 item.

* The fix for #23 doesn't raise a 401 error as suggested in the issue, I figured it was cleaner to just ignore it the same as normal extraneous parameters. Could easily be changed if need be.

[Micalobia]

The reason it's weird about showing the art commits too is that I merged an old art branch into the recipe branch before the art branch was finalized, so it just looks a bit weird.

[Micalobia]

I compressed buy#_price and buy#_currency into a list called buy, which looks like this:

[
    {
        "price":300,
        "currency":"Bells"
    },
    {}
]

I also compressed availability# and availability#_note in a similar manner, in a list called availability