Update nitrokey crate to 0.2.3

This change updates the nitrokey crate to version 0.2.3. This version
bumps the rand crate used to 0.6.1, which in turn requires an additional
set of dependencies.

Import subrepo nitrokey/:nitrokey at b3e2adc5bb1300441ca74cc7672617c042f3ea31
Import subrepo rand/:rand at 73613ff903512e9503e41cc8ba9eae76269dc598
Import subrepo rustc_version/:rustc_version at 0294f2ba2018bf7be672abd53db351ce5055fa02
Import subrepo semver-parser/:semver-parser at 750da9b11a04125231b1fb293866ca036845acee
Import subrepo semver/:semver at 5eb6db94fa03f4d5c64a625a56188f496be47598

1 files changed, 47 insertions, 0 deletions

diff --git a/rand/rand_isaac/README.md b/rand/rand_isaac/README.md
new file mode 100644
index 0000000..02d1230
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+++ b/rand/rand_isaac/README.md
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+# rand_isaac
+
+[![Build Status](https://travis-ci.org/rust-random/rand.svg)](https://travis-ci.org/rust-random/rand)
+[![Build Status](https://ci.appveyor.com/api/projects/status/github/rust-random/rand?svg=true)](https://ci.appveyor.com/project/rust-random/rand)
+[![Latest version](https://img.shields.io/crates/v/rand_isaac.svg)](https://crates.io/crates/rand_isaac)
+[![Book](https://img.shields.io/badge/book-master-yellow.svg)](https://rust-random.github.io/book/)
+[![API](https://img.shields.io/badge/api-master-yellow.svg)](https://rust-random.github.io/rand/rand_isaac)
+[![API](https://docs.rs/rand_isaac/badge.svg)](https://docs.rs/rand_isaac)
+[![Minimum rustc version](https://img.shields.io/badge/rustc-1.22+-lightgray.svg)](https://github.com/rust-random/rand#rust-version-requirements)
+
+Implements the ISAAC and ISAAC-64 random number generators.
+
+ISAAC stands for "Indirection, Shift, Accumulate, Add, and Count" which are
+the principal bitwise operations employed. It is the most advanced of a
+series of array based random number generator designed by Robert Jenkins
+in 1996[^1][^2].
+
+ISAAC is notably fast and produces excellent quality random numbers for
+non-cryptographic applications.
+
+Links:
+
+-   [API documentation (master)](https://rust-random.github.io/rand/rand_isaac)
+-   [API documentation (docs.rs)](https://docs.rs/rand_isaac)
+-   [Changelog](CHANGELOG.md)
+
+[rand]: https://crates.io/crates/rand
+[^1]: Bob Jenkins, [*ISAAC: A fast cryptographic random number generator*](http://burtleburtle.net/bob/rand/isaacafa.html)
+[^2]: Bob Jenkins, [*ISAAC and RC4*](http://burtleburtle.net/bob/rand/isaac.html)
+
+
+## Crate Features
+
+`rand_isaac` is `no_std` compatible. It does not require any functionality
+outside of the `core` lib, thus there are no features to configure.
+
+The `serde1` feature includes implementations of `Serialize` and `Deserialize`
+for the included RNGs.
+
+
+# License
+
+`rand_isaac` is distributed under the terms of both the MIT license and the
+Apache License (Version 2.0).
+
+See [LICENSE-APACHE](LICENSE-APACHE) and [LICENSE-MIT](LICENSE-MIT), and
+[COPYRIGHT](COPYRIGHT) for details.