title: How to change the XAxis used on my chart ShinobiCharts
body: <p>I'd like to have the xAxis of my chart to look like this :</p>
  
  <p>Jan, Feb, Mar, Apr, ..... Nov, Dec</p>
  
  <p>Right now it's following it's default, numbering xAxis according to the number of Data Points.</p>
  
  <p>How can i achieve this change to this axis ?</p>
  
  <p>I've tried using Category Axis and setting an NSMutableArray containing these strings ("Jan", "Feb"...) as categories and  with a numberRange going from 1 to 12 but it didn't work.</p>
  
  <pre><code>chart = [[ShinobiChart alloc] initWithFrame:chartEmbaixo.frame withPrimaryXAxisType:SChartAxisTypeCategory withPrimaryYAxisType:SChartAxisTypeNumber];
  
  NSMutableArray * monthNames = [[NSMutableArray alloc] initWithObjects:@"Jan", @"Fev", @"Mar", @"Abr", @"Mai", @"Jun", @"Jul", @"Ago", @"Set", @"Out", @"Nov", @"Dez", nil];
  
  SChartNumberRange * numberRange = [[SChartNumberRange alloc] initWithMinimum:[NSNumber numberWithInt:1]andMaximum:[NSNumber numberWithInt:12]];
  SChartCategoryAxis *xAxis = [[SChartCategoryAxis alloc] initWithRange:numberRange];
  xAxis.categories = monthNames;
  
  chart.xAxis = xAxis;
  </code></pre>