An implementation of CMZ14 credentials in Rust

Ian Goldberg c446828be7 Refactor the two types of credential issuing each into their own submodule 5 anni fa
src c446828be7 Refactor the two types of credential issuing each into their own submodule 5 anni fa
tests c446828be7 Refactor the two types of credential issuing each into their own submodule 5 anni fa
Cargo.toml 1a145a6952 Nonblind credential issuing and verification of the resulting proof 5 anni fa