Previously we relied on the static directory to construct the pass condition, but this doesn't include many things added to the build other than static files. So instead of adding these explicitly through `extraAppRoutes`, base the Pass condition on the final build, but exclude the view .html files. This way the version.txt, routes.json, and all directories added by webpack will be resolved to S3 rather than scratchr2.
Thanks @thisandagain — now I know why you said async.auto is so awesome.
Also throw the error so we get a stacktrace, and make the bucket name and service ID into constants.
* Builds the Pass condition based on the static directory and view routes.
* Updates Fastly with new header and conditions based on the view routes.
* Uses a nice module for interacting with fastly :)
Needs some major cleanup but it works. Hopefully Travis will work too.
