Replace unstable VecMap w/ external crate.

deps/Cargo.toml

@@ -10,6 +10,7 @@ libc = "0.1.8"
 getopts = "0.2.11"
 bit-vec = "0.4.0"
 bit-set = "0.2.0"
+vec_map = "0.3.0"
 num_cpus = "*"
 rand = "0.3.8"
 regex = "0.1.38"

src/tr/deps.mk

@@ -1 +1 @@
-DEPLIBS += bit-vec bit-set
+DEPLIBS += bit-vec bit-set vec_map

src/tr/tr.rs

@@ -1,5 +1,5 @@
 #![crate_name = "tr"]
-#![feature(io, vecmap)]
+#![feature(io)]
 
 /*
  * This file is part of the uutils coreutils package.
@@ -14,11 +14,12 @@
 
 extern crate bit_set;
 extern crate getopts;
+extern crate vec_map;
 
 use bit_set::BitSet;
 use getopts::Options;
-use std::collections::VecMap;
 use std::io::{stdin, stdout, BufReader, Read, Write};
+use vec_map::VecMap;
 
 use expand::ExpandSet;