ModelBuilder upgrade

• #66 Fix multiline ( (?x) ) patterns not properly supported in grammar (@pdw-mb)
• #70 Important upgrade to ModelBuilder and grammar specification of classes for generated nodes. See pull request #78 for details (@Victorious3)

Bug fix release

• #56 Add missing tatsu/g2e/antlr.ebnf to distribution (@Ruth-Polymnia)
• #62 Fix TatSu ignoring start rule provided in command line (@r-chaves)
• Fix typos in documentation (@mjdominus

Bug fix release

• #42 Rename vim files from grako.vim to tatsu.vim (@fcoelho)
• #51 Fix inconsistent code generation for whitespace (@fpom)
• #54 Only care about case of first letter of rule name for determining advance over whitespace (@acw1251)

Bug fix release

• #40 Make the start rule default to the first rule defined in the grammar (@hariedo)
• #43 Import re from tatsu.util to support optional regex-only features (@azazel75)
• #47 Fix incorrect sample code in documentation

Bug-fix release (includes not working)

• #37 Regression: The #include pragma works by using the EBNFBuffer from grammars.py. Somehow the default EBNFBootstrapBuffer from bootstrap.py has been used instead (@gegenschall).

• #38 Documentation: Use of json.dumps() requires ast.asjson() (@davidchen).

Revert incorrect changes to left recursion

• #27 Undo the fixes to dropped input on left recursion because they broke previously expected behavior.

• #33 Fixes to the calc example and mini tutorial (@heronils)

• #34 More left-recursion test cases (@manueljacob).

Left recursion bug fix

Fixed

• #27 Left-recursive parsers would drop or skip input on many combinations of grammars and correct/incorrect inputs(@manueljacob)

• Documentation fixes (@manueljacob, @paulhoule)

provisions for recovery, optimizations, cleanup

Added

• Parse speeds on large files reduced by 5-20% by optimizing parse contexts and closures, and unifying the AST_ and CST_ stacks.

• Added the "skip to" expression ( ->), useful for writing recovery rules. The parser will advance over input, one character at time, until the expression matches. Whitespace and comments will be skipped at each step.

• Added the any expression ( /./) for matching the next character in the input.

• The ANTLR_ grammar for Python3_ to the g2e example, and udate g2e to handle more ANTLR_ syntax.

• Check typing with Mypy_.

Changed

• Removed the very old regex example.

• Make parse traces more compact. Add a sample to the docs.

• Explain Grako_ compatibility in docs.

bugfix

• tatus.objectmodel.Node was not setting attributes from AST

Left recursion + general cleanup

• New support for left recursion with correct associativity. All
  test cases pass.
• Left recursion is enabled by default. Use the
  @@left_recursion :: False directive to diasable it.
• Renamed the decorator for generated rule methods to @tatsumasu.
• Refactored the tatsu.contexts.ParseContext for clarity.
• The @@ignorecase directive and the ignorecase= parameter no
  longer appy to regular expressions (patterns) in grammars. Use
  (?i) in the pattern to ignore the case in a particular pattern.
• Now tatsu.g2e is a library and executable module for translating
  ANTLR grammars to TatSu.
• Modernized the calc example and made it part of the documentation
  as Mini Tutorial.
• Simplified the generated object models using the semantics of class
  attributes in Python.