README.md in timespan-0.1.0 vs README.md in timespan-0.1.2

@@ -10,9 +10,13 @@
 	t.to_weeks # => 0
 	t.to_secs # => 259200
 	t.to_hours = 10800
 ``
 
+== TODO
+
+Should use Duration for duration calculations!
+
 == Contributing to timespan
  
 * Check out the latest master to make sure the feature hasn't been implemented or the bug hasn't been fixed yet.
 * Check out the issue tracker to make sure someone already hasn't requested it and/or contributed it.
 * Fork the project.