Query referencing

We support naming queries, then referencing these queries as subqueries by name within other queries.

Every query by default has a name, at the top of the block -- it's usually something like block1 by default. You can reference queries by these names using the { command (the same command used to reference variables).

Unlike with control blocks, however, you'll need to close the reference with a } (right curly bracket), as we support referencing of other properties of query blocks.