Updating to latest masters

Deployed new bundler (e12b79121df18158403ca5f0b160fc95883d0ccc):
* Don't use process.exit on a normal successful exit (avoid truncating files)
* Sync output directories before bundling (avoid truncating files)
* Check for truncated image files during download (avoid truncating files)

Deployed new latexer (f90a3141367eddbc72f5a657fe45c5ebe5ee1c98):
* Allow page breaks between empty sections.
* Ensure latin font is used for list item bullets.
* Add Lohit fonts for Indic languages, and use them whenever possible
  (bug 28206, bug 68922)

Deployed new service (158d50bc9274ace22daaa76927e03c3ec6b1de71):
* Remove useless configuration variable.

Change-Id: I4fc92b91b6f5240b777a21a20787965f0c6b9284