Testing out explicit Comparator.
Changed VocabularyJob to carry a payload – word counts.
Fixed VocabularyJob bug.
Checking for malformed parse.
Added hack to trim number of alignments in extraction.
Changed lex-words limits to default to phrase initial length.
Fixes to map-reduce features, removed reordering-invariant target-lhs features as they are the default now.
Deactivated ill-conceived hack.