DonutChart

Configuration:

• tooltip {Boolean} enables tooltip (default: true)
• format {String} a template (Tangular) for rendering tooltip (default: {{ value | format(0) }})
• presentation {Boolean} enables presentation mode (default: true)
• select {String} a path to method if a value is selected
• redraw {String} a path to method if the chart is redrawn
• animate {Boolean} enables/disables animations (default: false)
• size {Number/String} width/height of donut (default: 0 = auto) or string is meant as a parent element
• highlight {Boolean} enables/disables highlight of pieces (default: true)
• margin {Number} adds a margin to size (default: 0)