An implementation of CMZ14 credentials in Rust

Ian Goldberg 10b7814750 Make the APIs of the two submodules match 3 rokov pred
src 10b7814750 Make the APIs of the two submodules match 3 rokov pred
tests 10b7814750 Make the APIs of the two submodules match 3 rokov pred
Cargo.toml 1a145a6952 Nonblind credential issuing and verification of the resulting proof 3 rokov pred