consolidate imports

src/tile.rs

@@ -1,13 +1,11 @@
-extern crate gfx;
-
 use ega;
 
 use ::std;
 use std::io::Read;
 use std::path::Path;
 
-use self::gfx::{CommandBuffer, Typed};
-use self::gfx::tex;
+use gfx::{self, CommandBuffer, Typed};
+use gfx::tex;
 
 const TILEDIM: u16 = 16;