Update configuration to build new working draft n4659.

Add new papers n4659 and n4661 (editors' report).

Update configuration to build new working draft n4640.

Add new papers n4639 (editors' report) and n4640.

Forcibly enable PDF compression so that LaTeX installation differences
don't cause the PDF file size to vary between 6MB and 16MB.

Update configuration to build new working draft n4618.

Add new papers n4619 (editors' report) and n4618.

Update configuration to build new working draft n4606.

Add new papers n4603 (editor's report), n4604 (C++17 CD), and n4606.

Update configuration for building n4604 (C++17 CD).

New papers n4583 and n4584.

[N4582] Update configuration for building new working draft.

Rebuild grammar, xrefs. Add new papers n4582 and n4583.

Update configuration for new working draft N4567, and build new papers

N4566 (editor's report) and N4567 (new working draft).

Update configuration for building N4527.

Add back redundant 'of arithmetic type' requirement at request of lib…

…-37799.