moses: bugfix for weighted columns.
moses: compressed tables incorrectly handled by boosting
moses: deploy the worst-possible-score in boosting calculations.
moses: implement worst-possible-score for demo problems.
moses: disable assert; it cuases too many problems.
Combo: work around a bug in the vistor pattern.
Moses UTest: work around score printing error
moses UTest: fix implicit dependence on default parameters
moses: selection scoring fix
moses: fixes for selection scorer.
Temporarily disable this test.