github.com tag 2.0.27 - August 22, 2016
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mv-mem-fences:  fix iterator double delete bug in eleveldb and
                build better memory fenced operations for referenced count objects.

github.com tag 2.0.26 - August 21, 2016
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mv-expiry-iter-bug:  DBImpl::NewIterator() was not setting the new expiry parameter.

github.com tag 2.0.25 - August 10, 2016
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Make LZ4 the default compression instead of Snappy.

github.com tag 2.0.24 - August 2, 2016
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mv-expiry:  open source expiry.  Supports one expiry policy for all databases.

github.com tag 2.0.23 - July 20, 2016
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mv-no-semaphore:  remove semaphore controlled thread in hot_threads.cc.  Instead use
 use mutex of thread 0 (only one thread's mutex) to address know race condition.

github.com tag 2.0.22 - June 22, 2016
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no change: iterator fix in eleveldb

github.com tag 2.0.21 - June 16, 2016
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branch mv-iterator-hot-threads:  correct condition where eleveldb MoveTask
 could hang an iterator. (https://github.com/basho/leveldb/wiki/mv-iterator-hot-threads)

