Remove dependency on zero_one feature

Cargo.toml

@@ -34,7 +34,7 @@ git = "https://github.com/ecoal95/rust-offscreen-rendering-context"
 [dependencies]
 gleam = "0.2"
 euclid = {version = "0.6.2", features = ["plugins"]}
-num = {version = "0.1.24", default-features = false}
+num = {version = "0.1.31", default-features = false}
 time = "0.1"
 fnv="1.0"
 scoped_threadpool = "0.1.6"

src/lib.rs

@@ -2,7 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-#![feature(step_by, zero_one)]
+#![feature(step_by)]
 //#![feature(mpsc_select)]
 
 #[macro_use]

src/util.rs

@@ -4,7 +4,7 @@
 
 use euclid::{Matrix4, Point2D, Rect, Size2D};
 use internal_types::{RectColors};
-use std::num::Zero;
+use num::Zero;
 use time::precise_time_ns;
 use webrender_traits::ColorF;