Developer notes
===============
This file documents some potentially-unfamiliar patterns contained within this
codebase.
`boolinator`
------------
This crate makes use of `boolinator` in places. Make sure you're familiar with
it.
`bool?` (or close enough)
-------------------------
Rust doesn't have `?` on `bool`. This crate uses an `&& { side_effects; true }`
pattern sometimes. The PEG-like parser uses a `bry!` macro (`try!` for bools).
`proptest`
----------
This crate makes extensive use of proptests, because they are awesome!