Add acknowledgements for John Tromp, Paige Peterson, Maureen Walsh, Jay Graber, and Jack Gavigan.

Signed-off-by: Daira Hopwood <daira@jacaranda.org>

protocol/protocol.tex

@@ -3532,6 +3532,7 @@ the \Zerocash protocol design; in addition to the inventors, this includes
 Mike Perry, Isis Lovecruft, Leif Ryge, Andrew Miller, Zooko Wilcox,
 Samantha Hulsey, Jack Grigg, Simon Liu, Ariel Gabizon, jl777, Ben Blaxill,
 Alex Balducci, Jake Tarren, Solar Designer, Ling Ren, Alison Stevenson,
+John Tromp, Paige Peterson, Maureen Walsh, Jay Graber, Jack Gavigan,
 and no doubt others.
 
 \Zcash has benefited from security audits performed by NCC Group and
@@ -3558,6 +3559,8 @@ The errors in the proof of Ledger Indistinguishability mentioned in
           (The precise prefixes are not decided yet.)
     \item Clarify why $\Blake{\ell}$ is different from truncated $\Blake{512}$.
     \item Add a paragraph about key length in \crossref{inbandrationale}.
+    \item Add acknowledgements for John Tromp, Paige Peterson, Maureen Walsh,
+          Jay Graber, and Jack Gavigan.
 \end{itemize}
 
 \subparagraph{2016.0-beta-1.5}