failing test
added fix suggested by scott
remove unneeded line from test
add better test
add fix for case with two conditions on outer table
ConditionExpression -> LogicalFunctionCondition
add AND, OR, XOR to BoolLogic and get rid of the binary thing that doesn't seem to be used
merge hchandl: Negate conditions for anti joins in NestedLoopMapper

Merge pull request #1589 from hchandl/sql-layer/antijoins
https://github.com/FoundationDB/sql-layer/pull/1589