Add getColumnTypes API to RecordSink
Add PageSink to SPI
Add release notes for ConnectorPageSink
Allow configurable number of tablewriters per task
Add documentation for task.writer-count
Add PageSink to SPI
Move RowPagesBuilder and SequencePageBuilder out of operator package
Change Raptor to use ConnectorPageSink interface
Minor refactorings for Raptor
Add a check for no nodes available
Added a utility method for parsing double values from json

It handles NaN and infinity.
Verify types in Hive connector before creating table

Fail during beginCreateTable() rather than at runtime.