REPL-friendly rendering of ObjectIds in .toString
$not queries should not have any index expectation

not entirely correct, some $not queries can use an
index. but I'm not sure how to allow expressing
both in the dsl.
fix types in index checker to match logging hooks
fix indexCache supertype

not super happy with this
explicit type annotation for paginate()
convert index field names to wire names
3.0.0-beta2