An implementation of Groth-Kohlweiss one-of-N knowledge of discrete logs

Ian Goldberg 6887efdc22 Start of implementation: message 1 complete 6 lat temu
gk15.go 6887efdc22 Start of implementation: message 1 complete 6 lat temu
main.go 6887efdc22 Start of implementation: message 1 complete 6 lat temu