Silence warnings and update examples to rust master

There's no need to specify the receiver time for unboxed closures anymore and
`std::rand` was moved to `crates.io` as `rand`.

Cargo.toml

@@ -27,6 +27,9 @@ bitflags = "0.1"
 path = "tcod-sys"
 version = "2.0.3"
 
+[dev-dependencies]
+rand = "0.1.2"
+
 # TODO: temporarily disabling debuginfo until this is fixed:
 # https://github.com/rust-lang/rust/issues/17257
 [profile.dev]

examples/astar-path-finding.rs

@@ -1,3 +1,5 @@
+#![feature(core)]
+
 extern crate tcod;
 
 use tcod::AStarPath;
@@ -14,7 +16,7 @@ fn create_path() -> AStarPath<'static> {
         [0, 1, 0, 1, 0, 1, 0, 1],
     ];
     // Movement like in Checkers: you can only move to the square of the same colour
-    let can_move = move |&mut: from: (i32, i32), to: (i32, i32)| -> f32 {
+    let can_move = move |from: (i32, i32), to: (i32, i32)| -> f32 {
         let (fx, fy) = from;
         let (tx, ty) = to;
         if chess_board[fy as usize][fx as usize] == chess_board[ty as usize][tx as usize] {

examples/dijkstra-path-finding.rs

@@ -1,3 +1,5 @@
+#![feature(core)]
+
 extern crate tcod;
 
 use tcod::DijkstraPath;
@@ -14,7 +16,7 @@ fn create_path() -> DijkstraPath<'static> {
         [0, 1, 0, 1, 0, 1, 0, 1],
     ];
     // Movement like in Checkers: you can only move to the square of the same colour
-    let can_move = move |&mut: from: (i32, i32), to: (i32, i32)| -> f32 {
+    let can_move = move |from: (i32, i32), to: (i32, i32)| -> f32 {
         let (fx, fy) = from;
         let (tx, ty) = to;
         if chess_board[fy as usize][fx as usize] == chess_board[ty as usize][tx as usize] {

examples/fov.rs

@@ -1,9 +1,8 @@
-#![feature(rand)]
+#![feature(core)]
 
+extern crate rand;
 extern crate tcod;
 
-use std::rand;
-
 use tcod::{Console, BackgroundFlag, FovAlgorithm, Map};
 
 // We'll use a basic structure to define our tiles.