Collect quotes about possibility of information apocalypse

[RichardLitt]

@jbenet:

(As a note of urgency, it's not actually at all guaranteed that we won't have terrible disasters this half-century that may wipe out major information caches -- we're trying to prepare for the worst. -- by the way, i'm appalled that there isn't a real "Plan to Backup All Human Knowledge" that we are actively undertaking. There's suggestions, but nothing concrete yet... (we can't even agree on long term storage media...) Anyway, Arxiv papers -- i think -- are a critical resource to back up first)