Sum crate count in all subcategories in a better way
Sum crate count in all subcategories in a better way

And make the top-level query that does this consistent with
subcategory queries.

rust-lang/crates.io,Susurrus/crates.io,steveklabnik/crates.io,steveklabnik/crates.io,rust-lang/crates.io,Susurrus/crates.io,steveklabnik/crates.io,steveklabnik/crates.io,Susurrus/crates.io,Susurrus/crates.io,rust-lang/crates.io,rust-lang/crates.io