New chart-example added (banner-size), and various bug fixes/changes.

1. A new chart-example (banner-size) added.
2. Movement of code from the anime-chart.js file to a new file:
chart-settings.js so that it's abvious to a user where to edit the more
in-depth chart settings (chart colours, etc).
3. Added the export buttons to the charts, so that a user wouldn't have
to use their print-screen key to convert the chart to a static image.
4. Updated to the latest version of HighCharts with a modification to
the MaxHeight attribute in the legend options (all detailed in the
highcharts.js file).