[zapps-wg] Sapling MPC

[Sean Bowe]

Zcash's Sapling upgrade is coming, and we're doing an MPC for its
zk-SNARK parameters. This MPC uses the Powers of Tau parameters to
construct parameters for three different circuits: a Sprout circuit,
and two Sapling circuits (one for inputs, one for outputs).

The code for participating (and verifying) is available here:

https://github.com/zcash-hackworks/sapling-mpc

If you'd like to participate in the MPC, please email <mpc at z.cash>.
Ian Munoz from the Zcash Company will be coordinating it. :)

Sean