rjackson/broccoli-caching-writer — pull request #1 by myfreeweb (2014-05-30 14:51:19+00:00)
Title: fix for async (promise) writers

Hi!

`broccoli-writer` expects a Promise from `write`.
So when I convert a plugin from `writer` to `caching-writer`, I should be able to return a Promise from `updateCache`.