Added first trace implementation
Added trace_id to python bindings.
Merge pull request #213 from euroelessar/master

Removed -Werror flag due to bugs in boost backported to RHEL 5
Merge branch 'master' of github.com:reverbrain/elliptics
Merge branch 'master' of github.com:reverbrain/elliptics into trace

Conflicts:
	cache/cache.cpp
Use char * in open() call
Cleanup dnet_state_reset() calls - generally it is not allowed to 'put' state's refcnt from arbitrary place, since we do not know whether refcnt was increased or not previously.
v2.24.14.2
Fixed tracing with low log level. Moving trace_id to begin of line in log string.
Traversed trace_id for index requests.
Added trace_id to cache
Destroy timed out transactions in checking thread. Correctly kill state with errors in it.
v2.24.14.3
Merge branch 'master' of github.com:reverbrain/elliptics
Renamed back dnet_trace* to dnet_log.
Added trace_id to dnet_backend_log. Added DNET_TRACE_BIT for ignoring current log level for traced request.
Added printing begin and end of id in dnet_dump_id_len
Made elliptics compatible with current eblob version.
Added comments to eblob compatibility solution.
Merge branch 'master' of github.com:reverbrain/elliptics into trace

Conflicts:
	library/pool.c