DOC: Add "DRAFT" and build date to Challenge document
DOC: Add "DRAFT" and build date to Challenge document

defined \now command. This could include the hour and minute, but I do
not know how to do so with respect to UTC instead of user's local time.

fmrchallenge/fmrbenchmark,fmrchallenge/fmrbenchmark,fmrchallenge/fmrbenchmark