Remove legacy options:

  'xValueFormatter'
  'pixelsPerXLabel'
  'xAxisLabelFormatter'
  'xTicker'
  'yValueFormatter'
  'pixelsPerYLabel'
  'yAxisLabelFormatter'
  'yTicker'
  'drawXGrid'
  'drawXAxis'
  'drawYGrid'
  'drawYAxis'
  'xAxisLabelWidth'
  'yAxisLabelWidth'

Fixes issue #514 
I've never seen this style in object literals before (space before & after the `:`). The [google style guide](https://google-styleguide.googlecode.com/svn/trunk/javascriptguide.xml?showone=Array_and_Object_literals#Array_and_Object_literals) suggests space after but not before, i.e. `drawAxis: false,`.