Add nitrokey as a dependency to nitrocli

The nitrokey crate provides a simple interface to the Nitrokey Storage
and the Nitrokey Pro based on the libnitrokey library developed by
Nitrokey UG.  The low-level bindings to this library are available in
the nitrokey-sys crate.

This patch adds version v0.2.1 of the nitrokey crate as a dependency
for nitrocli.  It includes the indirect dependencies nitrokey-sys
(version 3.4.1) and rand (version 0.4.3).

Import subrepo nitrokey/:nitrokey at 2eccc96ceec2282b868891befe9cda7f941fbe7b
Import subrepo nitrokey-sys/:nitrokey-sys at f1a11ebf72610fb9cf80ac7f9f147b4ba1a5336f
Import subrepo rand/:rand at d7d5da49daf7ceb3e5940072940d495cced3a1b3

1 files changed, 51 insertions, 0 deletions

diff --git a/rand/rand-derive/README.md b/rand/rand-derive/README.md
new file mode 100644
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+++ b/rand/rand-derive/README.md
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+
+rand_macros
+====
+
+`#[derive(Rand)]` functionality for the `rand::Rand` trait.
+
+## Usage
+Add this to your `Cargo.toml`:
+
+```toml
+[dependencies]
+rand = "0.4"
+rand_macros = "0.2"
+```
+
+and this to your crate root:
+
+```rust
+extern crate rand;
+#[macro_use]
+extern crate rand_macros;
+```
+
+## Examples
+
+`#[derive(Rand)]` can be used on any `struct` or `enum` where all fields/variants implement `rand::Rand`.
+
+```rust
+#[derive(Debug, Rand)]
+struct Foo {
+    x: u16,
+    y: Option<f64>,
+}
+
+#[derive(Debug, Rand)]
+enum Bar {
+     X{x: u8, y: isize},
+     Y([bool; 4]),
+     Z,
+}
+```
+Now you can call the `Rng::gen()` function on your custom types.
+
+```rust
+use rand::Rng;
+
+let mut rng = rand::thread_rng();
+
+println!("{:?}", rng.gen::<Foo>());
+println!("{:?}", rng.gen::<Bar>());
+```