remove dependency on rustc-serialize

closes #36

Author: mcginty

Cargo.lock

@@ -36,7 +36,7 @@ unix-daemonize = "^0.1"
 num-bigint = "^0.1"
 num-traits = "^0.1"
 byteorder = "^1"
-rustc-serialize = "^0.3"
+hex = "^0.2"
 lazy_static = "^0.2"
 ring = "^0.9.4"
 time = "^0.1"

Cargo.toml

@@ -13,8 +13,8 @@ extern crate num_traits;
 extern crate udt;
 extern crate ring;
 extern crate time;
-extern crate rustc_serialize;
 extern crate colored;
+extern crate hex;
 
 // crates needed for unit tests
 #[cfg(test)]
@@ -29,6 +29,7 @@ use byteorder::{ReadBytesExt, WriteBytesExt, LittleEndian};
 use colored::*;
 use connection::{PortRange, Transceiver};
 use log::{LogRecord, LogLevel, LogMetadata};
+use hex::ToHex;
 use std::net::{SocketAddr, IpAddr};
 use std::fs::File;
 use std::io;
@@ -39,7 +40,6 @@ use std::str::FromStr;
 use std::sync::mpsc;
 use std::time::{Instant, Duration};
 use progress::Progress;
-use rustc_serialize::hex::ToHex;
 use unix_daemonize::{daemonize_redirect, ChdirMode};
 use file::ReadMsg;
 

src/lib.rs

@@ -1,13 +1,11 @@
-extern crate rustc_serialize;
-
 use connection::PortRange;
 use std::collections::HashMap;
 use std::io;
 use std::net::SocketAddr;
 use std::path::PathBuf;
 use std::process::{Command, Output};
 use std::str::FromStr;
-use rustc_serialize::hex::FromHex;
+use hex::FromHex;
 
 lazy_static! {
     static ref SECURE_OPTS_MAP: HashMap<&'static str, &'static str> = {
@@ -166,8 +164,7 @@ impl Connection {
                                   "unsupported protocol version"));
         }
 
-        let mut keybytes = Vec::with_capacity(32);
-        keybytes.extend_from_slice(&keyhex.from_hex().unwrap()[..]);
+        let keybytes = Vec::<u8>::from_hex(keyhex).unwrap();
         let addr: SocketAddr = try!(SocketAddr::from_str(&format!("{}:{}", ip, port)[..])
             .map_err(|_| {
                 Error::new(ErrorType::BadServerResponse,