Features
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* INFO-level log confirmation that a connection was opened to a node that was marked up (PYTHON-116)
* Avoid connecting to peer with incomplete metadata (PYTHON-163)
* Add SSL support to gevent reactor (PYTHON-174)
* Use control connection timeout in wait for schema agreement (PYTHON-175)
* Better consistency level representation in unavailable+timeout exceptions (PYTHON-180)
* Update schema metadata processing to accommodate coming schema modernization (PYTHON-185)
Bug Fixes
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* Support large negative timestamps on Windows (PYTHON-119)
* Fix schema agreement for clusters with peer rpc_addres 0.0.0.0 (PYTHON-166)
* Retain table metadata following keyspace meta refresh (PYTHON-173)
* Use a timeout when preparing a statement for all nodes (PYTHON-179)
* Make TokenAware routing tolerant of statements with no keyspace (PYTHON-181)
* Update add_collback to store/invoke multiple callbacks (PYTHON-182)
* Correct routing key encoding for composite keys (PYTHON-184)
* Include compression option in schema export string when disabled (PYTHON-187)