Reinstate NIP-88

[abhay-raizada]

Since the drama that caused NIP 88 to be removed: #1501

There have been two major updates:

• https://getwired.app has also integrated this NIP

• https://pollerama.fun has added expiring polls, which no longer makes this feature hypothetical.

I have made very slight changes according to some of the concerns raised in the comment thread.

@fiatjaf @vitorpamplona @staab @smolgrrr @alexgleason

[mikedilger]

This looks about right. I didn't study it in detail, but I like the non-replaceable response event, the use of an 'e' tag instead of a 'd' tag, the option for multiple choice, and explaining how to count.