Upgrade to rustc 7e43f419c 2014-11-15.

Author: SimonSapin

src/color.rs

@@ -4,6 +4,7 @@
 
 use std::ascii::AsciiExt;
 use std::fmt;
+use std::num::{Float, FloatMath};
 
 use ast::*;
 

src/tests.rs

@@ -4,6 +4,7 @@
 
 use std::io;
 use std::io::{File, Command, Writer, TempDir, IoResult};
+use std::num::Float;
 use serialize::{json};
 use serialize::json::ToJson;
 use test;