Pyparsing 2.3.0

• NEW SUPPORT FOR UNICODE CHARACTER RANGES
  This release introduces the pyparsing_unicode namespace class, defining
  a series of language character sets to simplify the definition of alphas,
  nums, alphanums, and printables in the following language sets:
  . Arabic
  . Chinese
  . Cyrillic
  . Devanagari
  . Greek
  . Hebrew
  . Japanese (including Kanji, Katakana, and Hirigana subsets)
  . Korean
  . Latin1 (includes 7 and 8-bit Latin characters)
  . Thai
  . CJK (combination of Chinese, Japanese, and Korean sets)

POSSIBLE API CHANGES:

• IndexErrors raised in parse actions are now wrapped in ParseExceptions
• ParseResults have had several bugfixes which remove erroneous nesting levels
  See the CHANGES file for more details.

New classes:

• PrecededBy - lookbehind match
• Char - single character match (similar to Word(exact=1))