moses documentation: add note about score printing.
moses: add an 'experts' flag for boosting
moses: Wire in the experts flag
combo: add ASSERT to catch programming bug.
moses: CTable counter is a double, not an int.
moses: move table weight to correct lcoation
moses: error estimation canot be ddone outside the scorer.
moses: get rid of the accumulating-scorer concept

Fold the accumulation directly into the bscorer.
embodiment: get rid of the accumulation-scorer
moses: start transition to new boosting system
moses: move to the new boosting framework.