Accounts, postings, and transactions can now all be filtered by the
tags in an account's declaration. In particular it's now possible to
more reliably select accounts by type, using their type: tag rather
than their name:
account myasset ; type:Asset
account myliability ; type:Liability
$ hledger accounts tag:type=^a
myasset
Accounts inherit tags from their parents.
API changes:
A finalised Journal has a new jdeclaredaccounttags field
for easy lookup of account tags.
Query.matchesTaggedAccount is a tag-aware version of matchesAccount.
