Vendor dependencies for 0.3.0 release

vendor/ctrlc/README.md

@@ -0,0 +1,57 @@
+# CtrlC
+A simple easy to use wrapper around Ctrl-C signal.
+
+[Documentation](http://detegr.github.io/doc/ctrlc/)
+
+## Example usage
+
+In `cargo.toml`:
+
+```toml
+[dependencies]
+ctrlc = "3.5"
+```
+
+then, in `main.rs`
+
+```rust
+use std::sync::mpsc::channel;
+use ctrlc;
+
+fn main() {
+    let (tx, rx) = channel();
+    
+    ctrlc::set_handler(move || tx.send(()).expect("Could not send signal on channel."))
+        .expect("Error setting Ctrl-C handler");
+    
+    println!("Waiting for Ctrl-C...");
+    rx.recv().expect("Could not receive from channel.");
+    println!("Got it! Exiting..."); 
+}
+```
+
+#### Try the example yourself
+`cargo build --examples && target/debug/examples/readme_example`
+
+## Handling SIGTERM and SIGHUP
+Add CtrlC to Cargo.toml using `termination` feature and CtrlC will handle SIGINT, SIGTERM and SIGHUP.
+
+## 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 shall be dual licensed as above, without any
+additional terms or conditions.
+
+## Similar crates
+
+There are alternatives that give you more control over the different signals and/or add async support.
+
+- [signal-hook](https://github.com/vorner/signal-hook)
+- [tokio::signal](https://docs.rs/tokio/latest/tokio/signal/index.html)