demo does not work in IE 11

[cyrfer]

The demo does not behave the same in Chrome and IE 11.

Using IE 11:

• I cannot change the color of elements in the demo.
• The CSS hover highlights the wrong pie-slice.
  • I clicked the bar chart, but the camera was selected
    

[maxklenk]

Hey @cyrfer,
I added a commit to the develop branch which should add support for the color problem in IE. Please check if it helps you. I have no IE to test the hover highlights, so I would be happy if you can have a look at it and provide a pull request.