rexjs-image-sprite/test/sprite.json

对指定文件夹中对图片文件进行合并、压缩，生成雪碧图及对应JSON文件

{"hello/add.png":{"x":0,"y":0,"width":70,"height":74},"hello/settings-switch-close.png":{"x":70,"y":0,"width":50,"height":51},"hello/settings-switch-open.png":{"x":120,"y":0,"width":50,"height":51}}