rails/sprockets-rails — pull request #13 by route (2012-08-12 15:00:07+00:00)
Title: Remove manifest option

Sprockets don't have option for configure where to write
manifest file. It's one of causes why we cannot use rake task
provided by sprockets for now.

After discuss there https://github.com/rails/sprockets-rails/issues/9
/cc @guilleiguaran @josevalim