Merge pull request #33 from euroelessar/master

Fixed remove method
Merge pull request #34 from euroelessar/master

Fixed remove method and dnet_find
Temporarily depend elliptics-dev on eblob-dev - it uses its headers, but this will be changed in several weeks
v2.21.4.0
dnet_id structure must be initialized when sending command request
Added file_info reply to cache-only write requests