修正饼图label靠的太近的问题
Merge branch 'master' of https://github.com/kissygalleryteam/kcharts into 1.3-rework
Merge branch 'master' of https://github.com/kissygalleryteam/kcharts into 1.3-rework
添加饼图demo
Merge pull request #106 from WeweTom/1.3-rework

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