Updating to latest masters

Deployed new bundler (021a70cd7680ffe2c814df2c1dd8c94cb565e031)
* Fix unreliable image streaming (bug 68929)
* Tighter query for images
* Use default papersize when bundling

Deployed new latexer (9686d0e937c7ed502353f346419abff84d420448)
* Convert TIFF images to PNG (bug 70866)
* Handle animated GIFs (bug 70865)
* Accept papersize settings from metabook (bug 68836)

Change-Id: Ia3c267bc63a407723c4570ac7b359f405a4d9057
Merge branch 'master' into wmf-deploy

Change-Id: I7836e84fa33211806f41f7f6419944409fd27787