Expose at_timezone hidden function
Improve error messages for Hive partition value parsing
Fix resource leak in query queue

Queries can transition to the CANCELED state before they are started. In
particular, this happens if a user cancels their query while it is
queued. In this case, the state change listener is never called, because
the query is already finished, and this leaks one slot in the query
queue.
Add release notes for 0.83
Add release notes for 0.83
[maven-release-plugin] prepare release 0.83
[maven-release-plugin] prepare for next development iteration
Disallow window functions order or partition on noncomparable types
Fix COUNT(*) in information_schema and sys tables
Improve error message when using DISTINCT with non-comparable type
Fix json parsing for non numeric numbers (nan and inf)
Don't override remotely-accessible flag when locationAwareScheduling=false
Fix explain help text
Add Xerial Snappy to Hive for Parquet
Update to arlift 0.97

- Remove redundant classes
Fix approximate joins
Fix random test failures in TestExchangeClient

Add test pages to output buffer before stating exchange client so client preforms
HTTP request as expected by tests.
Fix state machine in MockExchangeRequestProcessor

Always create mock buffers for requested resources to avoid null pointer exceptions
Consolidate mock buffer code to improve readability
Fix bug in summarizing stats

Stats were not being summarized even if it was requested, if the state
and timeout were not set
Be more aggressive summarizing stats

Remove pipeline stats, since they're unused