Updating to latest masters

Deployed new service (6d1c4a5e00d51ee55eb739ce5469cf7f47a4efa8):
* Hash all metabook props for the collection id.
  (Don't cache too aggressively.)

Deployed new bundler (0d8e3664d9347eb6d5c02ec8b3e8db1bb546ca4c)
* Reduce default image resolution to 150 dpi (bug 68576).
* Don't crash on images in subpages, or images with invalid titles.
* Don't crash on bad image metadata (work around bug 71135).

Deployed new latexer (d5ea61db485f6f01554c83abd47a88c2e709e8a0)
* Fix CJK definition in polyglossia.
* Add font and language information for additional indic languages.
* Don't crash if section/chapter title contains a URL.
* Don't crash if we encounter an uncontained <li>.
* Don't crash if <div> begins a figure caption.
* Don't crash on `;#`.
* Don't crash if chapter has no items.
* Add support for metabook toc option == "auto".
* Upgrade node-icu-bidi to v0.1.3.

Change-Id: I1a78ec83f37ce43bc1a6e9abdf480edde98889d3
Merge branch 'master' into wmf-deploy

Change-Id: Ia4bdb4aa6de7d414641afbff6b88945187e20035