markov: new module
markov: new module

Former-commit-id: af0dba43e04e8f74dde564d0ae3f1b1411d7f2a5 [formerly 1ad8c69a5c0b391747f0e36db36aa6c0f716aa6d]
Former-commit-id: 930e6a8f7619b6f0f0a2ca7b979a61dfee40e1de
torhve/ivar2,torhve/ivar2,torhve/ivar2,haste/ivar2