Revert "Update broccoli-caching-writer to get build speed improvements"
Revert "Update broccoli-caching-writer to get build speed improvements"

This reverts commit 35f6cfe9fb39e4563853d900d6104c606715eef1.

See https://github.com/ef4/ember-browserify/issues/44

ef4/ember-browserify,asakusuma/ember-browserify