Awesome library @nsweeting! Thanks for making this.

It would be cool if you could sort by an attribute on an associated object. For example, sort Posts by their Author's name. It may make sense to be able to pass a reference to a function, similar to how it's done with sorting, but the library would pass the sort direction instead of a value.

It might be handy to expose total_pages (i.e. something like: round(Float.ceil(total / page_total))) in meta.

This would be useful for rendering a "Last Page" link.