Merge pull request #39 from kkawakam/release-0.2.3

Release 0.2.3
diff --git a/Cargo.toml b/Cargo.toml
index 2298d2c..476a1e0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rustyline"
-version = "0.2.2"
+version = "0.2.3"
 authors = ["Katsu Kawakami <kkawa1570@gmail.com>"]
 description = "Rustyline, a readline implementation based on Antirez's Linenoise"
 documentation = "http://kkawakam.github.io/rustyline/rustyline"
diff --git a/README.md b/README.md
index 8fad9aa..604d7b0 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@
 
 ```toml
 [dependencies]
-rustyline = "0.2.2"
+rustyline = "0.2.3"
 ```
 
 ## Features
diff --git a/src/char_iter.rs b/src/char_iter.rs
index 7d0c46d..129786d 100644
--- a/src/char_iter.rs
+++ b/src/char_iter.rs
@@ -1,6 +1,7 @@
 //! An iterator over the `char`s of a reader.
 //!
 //! A copy of the unstable code from the stdlib's std::io::Read::chars.
+//! TODO: Remove this once [Read::chars](https://github.com/rust-lang/rust/issues/27802) has been stabilized
 
 use std::error;
 use std::fmt;