Proper handling of verse 0.
Added methods to Versification:
    isIntro, isChapterIntro, isBookIntro (to allow front-end to skip verse 0).
    next(Verse) to optimally get the following verse.
Removed skipping of verse 0 from BitwisePassage.iterator, AccuracyType, AbstractPassage
Optimized Versification for common operations.
Optimized VerseRange.VerseIterator to not call v11n.decode