v2.0.0

• REMOVED support for Python 2.6
• FIXED CPU Pegging bug: Cleanup IOLoop and internal stack in TornadoSession on connection error. In the case of a connection error, the failure to do this caused CPU to peg @ 100% utilization looping on a non-existent file descriptor. Thanks to cknave for his work on identifying the issue, proposing a fix, and writing a working test case.
• Move the integration tests to use a local docker development environment
• Added new methods queries.pool.Pool.report and queries.pool.PoolManager.Report for reporting pool status.
• Added new methods to queries.pool.Pool for returning a list of busy, closed, executing, and locked connections.