Merge branch 'master' of https://github.com/dxq613/bui
* theme新增
    * 组合饼图展现隐藏的yaxis判断修复.
    * toopTip新增crossLine
    * 图形marker问题修复+vml图形marker位置BUG修复
    * store的tickline问题修复
    * 饼图100%问题修复(svg的path画圆环还是比较别扭的.)
    * tickLineoffset距离分开
    * markers定位
Merge pull request #146 from fangk/issue_chartFix

Issue chart fix