Updates for latest rustc.

src/editor/cursor.rs

@@ -103,8 +103,6 @@ impl Index<usize> for CursorSet {
 
 
 impl IndexMut<usize> for CursorSet {
-    type Output = Cursor;
-    
     fn index_mut<'a>(&'a mut self, _index: &usize) -> &'a mut Cursor {
         &mut (self.cursors[*_index])
     }

src/main.rs

@@ -2,6 +2,7 @@
 #![feature(io)]
 #![feature(collections)]
 #![feature(path)]
+#![feature(unicode)]
 #![feature(test)]
 #![feature(std_misc)]