* Make must_cast by-value and by-shared-ref functions const (but not by-mut-ref)
* Add comment for transmute! macro new arm, and update Cargo.toml comment for must_cast MSRV.
- new feature `nightly_docs` enables `doc_cfg` unstable feature that allows showing explicit dependencies on features.
- new cargo alias `nightly_docs` for a more convenient local documentation build `cargo +nightly nightly_docs --open`.
- annotate exported items and implementations depending on some feature with the corresponding `doc(cfg())` attribute.
- add the `nightly_docs` feature to the `[package.metadata.docs.rs]` section.
* `impl Zeroable for Atomic*`
fixes#74
* added feature flag for `zeroable_atomics`
Added documentation for some feature flags on the `Zeroable` trait.
Also fixed some invalid references in doc-comments.
* add MaybePod and NoPadding traits
* MaybePod and NoPadding derive macros
* fix doctest
* fmt
* fix bad doc link
* move new casting functions into separate modules
* fmt
* fix doctest and derive test
* remove relaxed module, add anybitpattern
* rename MaybePod to CheckedCastFromPod
* rename checked casting functions
* rework CheckedCastFromPod into CheckedBitPattern
* add anybitpattern derive, fix up other derives
* fix doctest
* fix derive trait of bits type
* export AnyBitPattern derive
* export anybitpattern from traits
* actually export derive macro for AnyBitPattern
* make bits struct pub because of type leaking rules
* allow clippy lint in derive
* add copy bound to CheckedBitPattern
* - replace Pod bounds with NoPadding+AnyBitPattern
- add try and panic versions of checked cast functions
- slightly update docs
* fix derive tests
* - adapt the allocation module cast functions as well
- as part of that, make AnyBitPattern a subtrait of Zeroable
- AnyBitPattern derive also derives Zeroable
* @JakobDegen and @zakarumych nits
* superset -> subset on CheckedBitPattern and NoPadding docs
* derive Debug on generated `Bits` structs, which can be useful for debugging failures
* don't derive debug on spirv target arch
* make it work on 1.34
* merge conflicts
* fix erroneous behavior in doctest
