Code review comments

- Revert version back to 0.0.4
- Add comment that set_cursor has no effect on Android

src/lib.rs

@@ -617,6 +617,7 @@ impl Window {
     }
 
     /// Modifies the mouse cursor of the window.
+    /// Has no effect on Android.
     pub fn set_cursor(&mut self, cursor: MouseCursor) {
         self.window.set_cursor(cursor);
     }