rename send_map to hashmap

This makes the module much more discoverable, and is in line with the
'treemap' naming.

src/libstd/json.rs

@@ -24,7 +24,7 @@ use core::float;
 use core::io::{WriterUtil, ReaderUtil};
 use core::io;
 use core::prelude::*;
-use core::send_map::linear;
+use core::hashmap::linear;
 use core::str;
 use core::to_str;
 use core::vec;
@@ -1223,7 +1223,7 @@ mod tests {
     use json::*;
 
     use core::result;
-    use core::send_map::linear;
+    use core::hashmap::linear;
 
     fn mk_object(items: &[(~str, Json)]) -> Json {
         let mut d = ~linear::LinearMap();

src/libstd/map.rs

@@ -19,7 +19,7 @@ use core::ops;
 use core::to_str::ToStr;
 use core::mutable::Mut;
 use core::prelude::*;
-use core::send_map::linear::LinearMap;
+use core::hashmap::linear::LinearMap;
 use core::to_bytes::IterBytes;
 use core::uint;
 use core::vec;

src/libstd/net_url.rs

@@ -20,8 +20,8 @@ use core::from_str::FromStr;
 use core::io::{Reader, ReaderUtil};
 use core::io;
 use core::prelude::*;
-use core::send_map::linear::LinearMap;
-use core::send_map;
+use core::hashmap::linear::LinearMap;
+use core::hashmap;
 use core::str;
 use core::to_bytes::IterBytes;
 use core::to_bytes;
@@ -246,7 +246,7 @@ pub fn encode_form_urlencoded(m: &LinearMap<~str, ~[~str]>) -> ~str {
  */
 pub fn decode_form_urlencoded(
     s: &[u8]
-) -> send_map::linear::LinearMap<~str, ~[~str]> {
+) -> hashmap::linear::LinearMap<~str, ~[~str]> {
     do io::with_bytes_reader(s) |rdr| {
         let mut m = LinearMap();
         let mut key = ~"";

src/libstd/workcache.rs

@@ -22,7 +22,7 @@ use core::pipes::{recv, oneshot, PortOne, send_one};
 use core::prelude::*;
 use core::result;
 use core::run;
-use core::send_map::linear::LinearMap;
+use core::hashmap::linear::LinearMap;
 use core::task;
 use core::to_bytes;
 use core::mutable::Mut;