Fix for stability changes

Author: sfackler

src/lib.rs

@@ -1,7 +1,7 @@
 //! Postgres support for the `r2d2` connection pool.
 #![doc(html_root_url="https://sfackler.github.io/doc")]
+#![feature(core)]
 #![warn(missing_docs)]
-#![allow(unstable)]
 extern crate r2d2;
 extern crate postgres;
 

tests/test.rs

@@ -1,4 +1,4 @@
-#![allow(unstable)]
+#![feature(std_misc)]
 extern crate postgres;
 extern crate r2d2;
 extern crate r2d2_postgres;