Vendor things

third-party/vendor/unicode-normalization/README.md

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+# unicode-normalization
+
+[![Build Status](https://travis-ci.org/unicode-rs/unicode-normalization.svg)](https://travis-ci.org/unicode-rs/unicode-normalization)
+[![Docs](https://docs.rs/unicode-normalization/badge.svg)](https://docs.rs/unicode-normalization/)
+
+Unicode character composition and decomposition utilities
+as described in
+[Unicode Standard Annex #15](http://www.unicode.org/reports/tr15/).
+
+This crate requires Rust 1.36+.
+
+```rust
+extern crate unicode_normalization;
+
+use unicode_normalization::char::compose;
+use unicode_normalization::UnicodeNormalization;
+
+fn main() {
+    assert_eq!(compose('A','\u{30a}'), Some('Å'));
+
+    let s = "ÅΩ";
+    let c = s.nfc().collect::<String>();
+    assert_eq!(c, "ÅΩ");
+}
+```
+
+## crates.io
+
+You can use this package in your project by adding the following
+to your `Cargo.toml`:
+
+```toml
+[dependencies]
+unicode-normalization = "0.1.23"
+```
+
+## `no_std` + `alloc` support
+
+This crate is completely `no_std` + `alloc` compatible. This can be enabled by disabling the `std` feature, i.e. specifying `default-features = false` for this crate on your `Cargo.toml`.