Add a test that demonstrates the problem.
Make ROW[S] optional after OFFSET. Requires adjusting the LOOKAHEAD predicate, but the conflict was only with using OFFSET as a correlation name.
merge MMcM: Make ROW[S] optional after OFFSET.

Merge pull request #86 from MMcM/sql-parser/offset-rows-optional
https://github.com/FoundationDB/sql-parser/pull/86