cluster: distribute tasks only on valid raft peers

common: generalize flags

build: codec: -> msgpack:

Merge pull request #75 from combaine/strict_time_slices

Strict time slices

fsm: fix snap restore hashicorp/raft/pull/270

fsm: fix snapshot dump

Merge pull request #70 from combaine/raft-snapshots

Raft snapshots

custom: configurable result logging

Merge pull request #57 from combaine/cache

cache: robust cache + juggler cache fix

cluster: refactor names