Pie chart demos

      pie title Pets adopted by volunteers
      accTitle: simple pie char demo
      accDescr: pie chart with 3 sections: dogs, cats, rats. Most are dogs.
    "Dogs" : 386
    "Cats" : 85
    "Rats" : 15
    

    pie
      title Key elements in Product X
        accTitle: Key elements in Product X
      accDescr: This is a pie chart showing the key elements in Product X.
      "Calcium" : 42.96
      "Potassium" : 50.05
      "Magnesium" : 10.01
      "Iron" :  5