Merge branch 'bubble-read-errors' into 'master'

Make the keys return their inner error, if any.

See merge request redox-os/termion!162

src/input.rs

@@ -19,7 +19,7 @@ impl<R: Read> Iterator for Keys<R> {
             match self.iter.next() {
                 Some(Ok(Event::Key(k))) => return Some(Ok(k)),
                 Some(Ok(_)) => continue,
-                e @ Some(Err(_)) => e,
+                Some(Err(e)) => return Some(Err(e)),
                 None => return None,
             };
         }