FIX: WordSegmentation did not work correctly if input string contained words in uppercase.
IMPROVEMENT: WordSegmentation now retains/preserves case.
IMPROVEMENT: WordSegmentation now keeps punctuation or apostrophe adjacent to previous word.
IMPROVEMENT: WordSegmentation now normalizes ligatures: "scientific" -> "scientific".
IMPROVEMENT: WordSegmentation now removes hyphens prior to word segmentation (as they might be caused by syllabification).
IMPROVEMENT: American English word forms added to dictionary in addition to British English e.g. favourable -> favorable.