P0325 to_array from LFTS with updates

[jensmaurer]

P0325R3 to_array from LFTS with updates (Zhihao Yuan)

https://issues.isocpp.org/show_bug.cgi?id=207
https://issues.isocpp.org/show_bug.cgi?id=558

[jensmaurer]

Encourage author to have a "revision history" section in his paper.

[tituswinters]

LEWG forwarded this to LWG in SD.