Add a class to the SVG when the chart initializes to allow us to contain global CSS and not affect other parts of a site.
Kill off horizon chart in examples since it doesn't even have a model, it was using using d3 all by itself.   Examples should use our project.
Make pie chart example show how to update data and disable states with some setInterval action.
Merge branch 'development' into gh-pages
build for example site.