Merge pull request #3 from euroelessar/master

Update to elliptics 2.20
Grape version update: 0.5.0
Depend on 0.9.4+ cocaine plugins
Depend on 0.9.9+ cocaine-dev
Added single-test example
Added manifests
Fixed compilation warnings
Extend test-single: let is send many events (@event-num events starting from @event-base0
also added cflags/ioflags and write type (random or none) into manifest
Members of elliptics_node_t must be shared pointers, since we do not have copy constructors and thus must share pointers
Nicer ::emit() logging
Updated test-single and added start/benchmark tool for this test
Use string as starting event. Allow to split load between multiple connections.
Grape version update: 0.5.1
Added libboost-system-dev dependency
Use boost::detail::atomic_count instead of std::atomic, which is not present in lucid
Updated to 0.10 cocaine
Update source base to new elliptics