Changelog

HDCS 1.4.0 (2018-02-07)
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1. Move to cmake system
2. Adding experimental KV dataengine, which allows local tiering(NVMe + SATA)
3. Adding initial high availability feature(faiure domain)
4. Refactor networking layer for RDMA support

HDCS 1.3.0 (2017-12-04)
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1. Improve threading model for hdcs core
2. Improve networking send/receive logic
3. Adding tiering policy support
4. Bug fixing on flush/evict on caching policy

HDCS 1.2.0 (2017-10-29)
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1. implment threadpool with std::thread
2. improve networking IO model

HDCS 1.1.0 (2017-08-06)
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1. Supporting master/slave replication
2. fixing bug on single_patch

HDCS 1.0.0 (2017-07-05)
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1. rebase version to 1.0.0 for open source