Audit with rescue and transpiler

For audit purposes only

Nightly optimizations

• Some potentially time-consuming operations such as scalars conversion from Montgomery form are now parallelized
• Multicore users can now use nightly version of Rust and specify nightly feature to get ~10% speedup on for proof generation over large circuits due to faster multiexponentiation

crates.io

Publish to crates.io as bellman_ce. No more pain for users specifying dependencies. Now can also use ff_ce, ff_derive_ce and pairing_ce as dependencies.

WASM love

• Add singlethreaded version
• Now “ff” and “pairing” crates are re-exported as “bellman::pairing::ff” and ”bellman::pairing”
• If for some reason you need to use “pairing” or “ff” directly and don’t want to use re-exports, than to avoid errors you should specify tag 0.16.2 for “pairing” and 0.5 for “ff”