Highcharts Remove Space Before First Bar And After Last

I'm trying to remove the space at the top and bottom of this chart http://jsfiddle.net/bfa1o0ar/7/ . It's the spacing just before the first bar and after the last bar. I've tried r

Solution 1:

Set min/max of the x axis to first category index + 0.1 and last category index - 0.1

min: 0 + 0.1,
  max: 4 - 0.1
},

example: http://jsfiddle.net/bfa1o0ar/8/