edit ExportJason
屏幕坐标转格子坐标算法
amend
可构建基本障碍的编辑器已经完成
amend
可以放置出发点Start了
Create README.md
Merge branch 'develop_win32' of https://github.com/wang-yichun/GravityMapCreater into develop_ios
fix bug on refresh cell. (round corner)

Signed-off-by: wang-yichun <wang-yichun@meyougames.com>