Speedy derive macro is throwing clippy errors in downstream crates

[danieleades]

error: this public function might dereference a raw pointer but is not marked `unsafe`
   --> src/structure/guid.rs:476:3
    |
476 |   Readable,
    |   ^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#not_unsafe_ptr_arg_deref
    = note: this error originates in the derive macro `Readable` (in Nightly builds, run with -Z macro-backtrace for more info)

Presumably this is because the Readable trait derived implementation has methods that dereference raw pointers. These could in principle be anything, so the methods are inherently unsafe and should be marked as such. That's most likely a breaking change (worth making).

[danieleades]

looks like this may have already been addressed in 1a2ec91 ?