Merge pull request #22 from euroelessar/master

Fixed debianization with upstream cocaine
Merge pull request #23 from euroelessar/master

 Fixed groups iterating in cpp binding
Merge pull request #24 from euroelessar/master

 Fixed multigroup callback
Currently read reply sends 2 messages: data + final ack
This commit optimizes case to single message (data only) - it doesn't set
DNET_FLAGS_MORE flag in data packet, so it will be handled properly.

If there is no data, ack will be sent with negative error code
Merge branch 'master' of github.com:reverbrain/elliptics
Elliptics version update: 2.21.2.0
Merge pull request #25 from euroelessar/master

Fixed compilation error with gcc-4.4
Elliptics version update: 2.20.2.1
Elliptics version update: 2.21.2.1
Depend on 0.18.1+ eblob
Do not collect reply messages in srw, send reply to client as soon as it was received by server.
Added signal blockers per threads