[Release] 1.1.1

bug fixes
 - Avoid to close the already closed socket
 - Skip proxy request when destination node is down
 - Fix the resource leaks of socket in server
 - Fix some compile warnings
 - Fix some race conditions in thread.cc
 - Check dynamic_cast result
 - Fix pthread_cond_wait() in zookeeper_lock::_assure_session_connected()
 - Add initialization of cluster#node
 - Remove some deadcode
 - Add null check before the code with the potential null access
 - Exit when IO-buffer is unsafe
 - Fix memory leak of proxy in op_parser_text
Merge pull request #68 from gree/release-1.1

[Release] 1.1.1
Fix zookeeper_lock::_assure_session_connected()
Replication over cluster
Merge pull request #82 from ikehara/fix_assure_session_connected

Fix zookeeper_lock::_assure_session_connected()
Merge pull request #47 from m-yoshimo/cluster-replication-concurrency

Replication over cluster
Fix failure of test_handler_cluster_replication
Merge pull request #86 from m-yoshimo/develop

Fix failure of test_handler_cluster_replication
Merge branch 'master' into develop
[2014/11/14] 1.2.0 release

feature updates
- Added storage access time watching feature
- Replication over cluster

bug fixes
- Avoid to close the already closed socket.
- Fix bwlimit when creating new partition
- Fix initial value of epoll socket
- Fix pthread_cond_wait() in zookeeper_lock::_assure_session_connected()
- Fix resource leak of server socket
- Fix some initialization
- Fix the race condition in thread class
- Fix zookeeper_lock::_assure_session_connected()
- Fixed socket condition add_epoll_socket and add_kqueue_socket
- Modified include guards to fit them to the C++ standard naming convention.
- Skip proxy when destination node is down

others
- Support TravisCI
Fix to build with clang
Fix connection_iostream::writeline return value
Add bwlimit to op_dump_key
Refactoring around bwlimitter
Merge pull request #87 from yayugu/feature/key_dump_bwlimit

key dump bwlimit
add copyright messages in each file
Add circle.yml and Dockerfile to test flare on circle-ci