fex-team/fis-optimizer-uglify-js — pull request #3 by 2betop (2014-10-09 16:24:11+00:00)
Title: add source map feature

添加 source map 功能，需要配合 [fis-prepackager-derived](https://github.com/fex-team/fis-prepackager-derived) 插件才能完成。

所有编译期“派生” 出来的新文件，都可以存入 file.extras.derived 数组里面。[fis-prepackager-derived](https://github.com/fex-team/fis-prepackager-derived) 负责把这些文件 添加到 release 列表。