* codec in separate module
* lisence headers
* codec.direct and codec.inverse as Kleisli instances
* test compilation error fixed
* fork and not execute in parallel
* better Codec; some dataset-grpc server implementations
* license headers
* compile bug fixed
* kademlia's Key invariants checking
* ContractsAllocatorApiServer implementation
* node test fixed
* better errors catching in KryoCodecs & disable logging in simulation tests
