Drop useless rvalue references on unique_ptr<T>.
Very basic HMAC signing code.
Merge pull request #94 from andrusha97/raft

Raft stuff
Merge branch 'master' of github.com:cocaine/cocaine-core
Workaround for some weird Blackhole behavior.
Tokens: keep the storage reference.
Merge pull request #95 from andrusha97/raft

Handle heartbeats responses in Raft.
Comment out the unused result in the previous PR.
Add Yandex LLC as our main corporate contributor.
Do not terminate the slave twice.
How could we miss our beloved Ops Leader.
Fix building on GCC 4.4.
process isolation. Unpack archive into clean spool
code style
Merge pull request #98 from noxiouz/fix_clean_spool_in_process_isolation

process isolation. Unpack archive into clean spool
Persistent Raft state.

Now Raft stores own state in a persistent storage. This commit should fix the following bug: a node may vote twice in the same term, when it restarts and forgets about the previous vote.