Added the ability to select fields inside of nested records with syntax like `array[["pt", "eta", "phi"], "nominal"]` (619).
Fixed Apache Arrow → Awkward Array (`ak.from_arrow`) for sliced Arrow arrays: it has an `offset` attribute we had been ignoring (625). Thanks to trickarcher for the extensive tests!
Ensured that an `ak.Array`'s `behavior` always gets passed to output of any operation (626), even if the input is a dict (627, affected `ak.zip`, `ak.cartesian`, and `ak.argcartesian`).
Fixed 629, `ak.with_field` dropping parameters (631), and 634, `ak.fill_none` not accepting a Record as a fill value (635).
Added a roadmap and upvote/thumbs up instructions to the README.