Revert "修改readme"
Revert "修改readme"

This reverts commit af142d34dc18c4f9f9ce14e10a18d201639ec6b5.

SuperMap/PlottingSymbol,alanjin/PlottingSymbol,giscafer/PlottingSymbol,SuperMap/PlottingSymbol,giscafer/PlottingSymbol,alanjin/PlottingSymbol