dropped journalPrices
renamed Price to AmountPrice, AKA "transaction price"
renamed MarketPrice to PriceDirective.
added new MarketPrice (more pure form of PriceDirective without the amount style information)
Prices is now a more efficient data structure, but not used yet.
A single transaction can be added by PUT to /add.
(I read that PUT, not POST, should be used to create;
perhaps the web add form should also use PUT ?)
As with the web form, the `add` capability is required (and enabled by
default).
Here's how to test with curl:
$ curl -s http://127.0.0.1:5000/add -X PUT -H 'Content-Type: application/json' --data-binary @in.json; echo
New readJsonFile/writeJsonFile helpers in Hledger.Web.Json
are handy for generating test data. Eg:
>>> writeJsonFile "in.json" (head $ jtxns samplejournal)
