Add image views to view sync script.

[the-t-in-rtf]

There is a script to sync all of the couchapp views that end up as design documents in the ul database. This script does not synchronise the separate views required to power the image API. We either need a second script, or at least documentation on how to sync those.

Note: The couchapp views are bundled up into something compatible with a CouchDB bulk update (i.e. all content in a docs array). The image views are hard-coded JSON, one file per view.