Added README
Added README

tempbottle/cpp-raft-1,osadalakmal/cpp-raft,tempbottle/raft,ar104/raft,tempbottle/cpp-raft-1,tempbottle/raft,osadalakmal/cpp-raft,tempbottle/cpp-raft-1,wangfakang/raft,jl777/raft,jl777/raft,tempbottle/cpp-raft-1,wangfakang/raft,ar104/raft,ar104/raft,osadalakmal/cpp-raft,osadalakmal/cpp-raft