guardian/frontend — pull request #5399 by rich-nguyen (2014-08-06 11:50:12+00:00)
Title: Sbt fixes and artifact resize

In this PR, we tidy sbt a little, and try to make the artifact smaller.

- Do not copy the sass source files unless you use dev mode.
- Update sbt resolvers.
- Null out the `sbt-web` packaging of the `assets` folder.