Import from query POC
Simplified the Simple example
Servlet now returns exception message on internal error
Null values are now assumed to be TextValue by default
When adding rows to a DataTable, ValueType is ignored for null fields and those fields are casted to the appropriate ValueType in the DataTable.
getDataTable now returns reference
Added some basic query parsing
Now have a barely functional pivot query
Added more aggregation methods and tests
Silence debug dump
Added very basic query handling