ZIP 1014: updates from review with Gtank.
ZIP 1014: updates from review with Gtank.

Update Discussions-To: URL.
Delete section on differences from Matt Luongo's proposal.
Clarify wording on large or long-duration Major Grants.
Reporting requirement for how "fair market value" is computed.
RFC 2119 conformance language.
"$" -> USD.
Copyediting.

Co-Authored-By: Daira Hopwood <cd7d43d5556a38ce626d53826fddc46adc597539@jacaranda.org>
Co-Authored-By: George Tankersley <9fd8de5fc2a7c2c0d469b2fff1afde4e5def37ba@zfnd.org>
Co-Authored-By: Josh Cincinnati <83967ecc7b0b479e3d2be8d460f05bbbb6d57659@users.noreply.github.com>
Signed-off-by: Daira Hopwood <cd7d43d5556a38ce626d53826fddc46adc597539@jacaranda.org>

zcash/zips,zcash/zips,zcash/zips,zcash/zips