Add doc-comment to test README examples

Author: GuillaumeGomez

Cargo.toml

@@ -14,3 +14,4 @@ categories = ["filesystem"]
 
 [dev-dependencies]
 tempdir = "0.3"
+doc-comment = "0.3"

src/lib.rs

@@ -63,6 +63,13 @@
 #![deny(missing_docs)]
 #![cfg_attr(all(test, windows), feature(std_misc))]
 
+#[cfg(test)]
+#[macro_use]
+extern crate doc_comment;
+
+#[cfg(test)]
+doctest!("../README.md");
+
 use std::cmp;
 use std::error::Error;
 use std::fmt;