Removes unused is_vowel function.
Adds dragonmapper.hanzi module.
Adds docstring explanation to _hanzi_to_pinyin.
Adds to_ipa function.
Adds tests for dragonmapper.hanzi's to_zhuyin and to_ipa.
Makes re.search use all Chinese punctuation, not just non-stops.
Makes all_readings option formatting more consistent.
Renames hanzi.NONE constant to hanzi.UNKNOWN.
Makes _is_pattern_match return False instead of None.
Removes duplicate words from data files.