imp(duration): use std::time::Duration everywhere

This gets rid of the time crate, which was necessary only while Duration wasn't stable
in std.

examples/auth.rs

@@ -4,15 +4,14 @@ extern crate hyper;
 extern crate chrono;
 extern crate getopts;
 extern crate open;
-extern crate time;
 
 use oauth2::GetToken;
 use chrono::{Local};
 use getopts::{HasArg,Options,Occur,Fail};
 use std::env;
 use std::default::Default;
-use time::Duration;
-use std::thread::sleep_ms;
+use std::time::Duration;
+use std::thread::sleep;
 
 
 fn usage(program: &str, opts: &Options, err: Option<Fail>) -> ! {
@@ -54,9 +53,7 @@ fn main() {
         token_uri: Default::default(),
         auth_uri: Default::default(),
         redirect_uris: Default::default(),
-        client_email: None,
-        auth_provider_x509_cert_url: None,
-        client_x509_cert_url: None
+        ..Default::default()
     };
 
     println!("THIS PROGRAM PRINTS ALL COMMUNICATION TO STDERR !!!");
@@ -69,9 +66,9 @@ fn main() {
                       You have time until {} to do that.
                       Do not terminate the program until you deny or grant access !",
                       pi.user_code, pi.verification_url, pi.expires_at.with_timezone(&Local));
-            let delay = Duration::seconds(5);
-            println!("Browser opens automatically in {} seconds", delay);
-            sleep_ms(delay.num_milliseconds() as u32);
+            let delay = Duration::from_secs(5);
+            println!("Browser opens automatically in {:?} seconds", delay);
+            sleep(delay);
             open::that(&pi.verification_url).ok();
             println!("DONE - waiting for authorization ...");
         }
@@ -81,7 +78,7 @@ fn main() {
                         connector: hyper::net::HttpConnector
                     });
 
-    match oauth2::Authenticator::new(&secret, StdoutHandler, client, 
+    match oauth2::Authenticator::new(&secret, StdoutHandler, client,
                                         oauth2::NullStorage, None).token(&m.free) {
         Ok(t) => {
             println!("Authentication granted !");
@@ -94,4 +91,4 @@ fn main() {
             std::process::exit(10);
         }
     }
-}
+}