fix(lib): fix fallout of numeric reform

See rust-lang/rust#18827

Author: Jorge Aparicio

src/format.rs

@@ -1,4 +1,4 @@
-use std::num;
+use std::num::Float;
 
 pub fn change(pct: f64, signed: bool) -> String {
     if signed {
@@ -27,11 +27,11 @@ fn signed_short(n: f64) -> String {
 pub fn time(ns: f64) -> String {
     if ns < 1.0 {
         format!("{:>6} ps", short(ns * 1e3))
-    } else if ns < num::pow(10.0, 3) {
+    } else if ns < 10.0.powi(3) {
         format!("{:>6} ns", short(ns))
-    } else if ns < num::pow(10.0, 6) {
+    } else if ns < 10.0.powi(6) {
         format!("{:>6} us", short(ns / 1e3))
-    } else if ns < num::pow(10.0, 9) {
+    } else if ns < 10.0.powi(9) {
         format!("{:>6} ms", short(ns / 1e6))
     } else {
         format!("{:>6} s", short(ns / 1e9))

src/plot/both.rs

@@ -5,6 +5,7 @@ use simplot::key::{Inside, Left, LeftJustified, Outside, Right, SampleText, Top}
 use simplot::{Figure, Solid};
 use stats::ConfidenceInterval;
 use std::iter::Repeat;
+use std::num::Float;
 use std::str;
 use test::stats::Stats;
 

src/plot/mod.rs

@@ -10,6 +10,7 @@ use stats::outliers::{Outliers, LowMild, LowSevere, HighMild, HighSevere};
 use stats::regression::Slope;
 use std::io::fs::PathExtensions;
 use std::iter::{Repeat, mod};
+use std::num::Float;
 use std::str;
 
 use estimate::{Distributions, Estimate, Estimates, Mean, Median, mod};

src/routine.rs

@@ -1,4 +1,5 @@
 use std::iter::{AdditiveIterator, mod};
+use std::num::Float;
 use time;
 
 use format;