Add Fill Patterns to Barchart Bars

Currently, bars can be customized with a series styling options; however, it is not possible to add image patterns to the bars, or the areas under line charts.

This would be a great addition to such an awesome framework, and would be extremely helpful for visually impaired people.

Resources:
This website contains several different patterns: https://bocoup.com/weblog/using-svg-patterns-as-fills/
An example of this done in SVG can be seen in this jfiddle : http://jsfiddle.net/yduKG/155/