Replication fixes: Cannot fully switch to replica mode until a valid decode position has been established, and fix calculation of commit position when replicating large updates. In both cases, an invalid log position could be used for recovery.
More efficient loads for union, intersection, and difference views, when using the built-in combiners.
Allow the Sorter.reset method to stop the sort when in the finishing step.
Add sort methods which produce results directly into single-use scanners.