Update README.md errors

This widget repo is awesome! Here is a couple recommendations to make the getting started code smoother.
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rkc13 2018-01-26 22:46:05 -08:00 committed by GitHub
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@ -41,6 +41,8 @@ import 'package:flutter_circular_chart/flutter_circular_chart.dart';
Create chart data entry objects:
```
final GlobalKey<AnimatedCircularChartState> _chartKey;
List<CircularStackEntry> data = <CircularStackEntry>[
new CircularStackEntry(
<CircularSegmentEntry>[
@ -53,7 +55,6 @@ List<CircularStackEntry> data = <CircularStackEntry>[
),
];
```
Create an `AnimatedCircularChart`:
```
@ -61,7 +62,7 @@ Create an `AnimatedCircularChart`:
Widget build(BuildContext context) {
return new AnimatedCircularChart(
key: _chartKey,
size: const Size(300, 300),
size: const Size(300.0, 300.0),
initialChartData: data,
chartType: CircularChartType.Pie,
);