Create a graph that shows run time and memory consumption #56

Someone* reached out to me after reading WHAT’S THE FASTEST DATA STRUCTURE TO IMPLEMENT A GAME BOARD IN ELIXIR? and made a very nice graphic:

Having this graph built-in would be very nice and probably not too hard as I suspect plotly supports this.

*there are multiple people by their name on github so I don't dare to gamble on the @mention