sodalite 0.4.0

Tweetnacl in pure rust with no std dependency
Documentation 
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# sodalite

An implimentation of tweetnacl in pure rust. Originally generated by manually translating `tweetnacl.c` into rust. Tested by verifying outputs match those of tweetnacl.

- [![Documentation (releases)](https://img.shields.io/badge/documentation-release-brightgreen.svg?style=flat)](https://docs.rs/sodalite/)
- [![Documentation (master)](https://img.shields.io/badge/documentation-master-yellow.svg?style=flat)](http://codyps.com/docs/sodalite/index.html)
- [![Travis](https://img.shields.io/travis/jmesmon/sodalite.svg?style=flat)](https://travis-ci.org/jmesmon/sodalite)
- [sodalite ![sodalite Crates.io](https://img.shields.io/crates/v/sodalite.svg?style=flat)](https://crates.io/crates/sodalite)
- [tweetnacl ![tweetnacl Crates.io](https://img.shields.io/crates/v/tweetnacl.svg?style=flat)](https://crates.io/crates/tweetnacl)
- [tweetnacl-sys ![tweetnacl-sys Crates.io](https://img.shields.io/crates/v/tweetnacl-sys.svg?style=flat)](https://crates.io/crates/tweetnacl-sys)

## Todo

 - provide additional APIs:
  - rather than take bare mutable references, use wrapper types around the refs to capture the underlying type (ie: prevent mixing keys between primitives)
  - add a buffer and/or "set-only" abstraction to prevent unsafety wrt uninitialized values (also should allow some internal optimization).
  - sodiumoxide style API that returns values rather than taking mutable refs
 - Use namespacing to seperate different APIs and backend impls
 - start testing against sodiumoxide as well
 - Provide some of the API impovements from libsodium that are missing nacl (disjoint signatures, not requiring special extra space in buffers)

## License

Licensed under either of
 * Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
 * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
  at your option.

### Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any
additional terms or conditions.