Resolve #194

I wanted to say it different.

README.md

@@ -37,3 +37,7 @@ should see a navigation page for your project.
 
 Click on any file to see what it looks like. For example, you can navigate to an Elm file like `examples/1-button.elm` and try it out. If you modify the file, you can just refresh that page and see the new version!
 
+
+## Note About Time Travel
+
+In 2013, Laszlo Pandy figured out how to make a reliable [Time Traveling Debugger](http://debug.elm-lang.org/) for Elm. It became part of `elm-reactor` [in 2014](http://elm-lang.org/blog/time-travel-made-easy) thanks to Michael James who adapted it for how we *thought* people would work with it in practice. Since then (1) the internal implementation of Elm has changed a decent amount and (2) we have learned a lot about what production users need to use this tool seriously. So time travel is not available in `elm-reactor` right now, but it will be coming back with a new design focused on real workflows. I think this will lead us to a tool that is both more reliable and more broadly useful whether you are making games or web apps.