- Grammar class now defines left und right default white space handling, so it is usually not necessary any more to specify whitespacehandling in the constructor of RE- and Token-objects.

- additions to AST-transformation-table of MLW_compiler.py

- some smaller bugs fixed

- Removed pattern "*_compiler.py" from .gitignore, because these file, though automatically generated, are meant to be extended manually

- XML-output for MLW-Test (still based on the concrete syntax tree!)

- Require()-Parser now yields "fatal_error" - otherwise it would be overlooked. (Parser-Error reporting in general needs to be reconsidered...!)
- testbed for MLW example optimized

slightly different syntax for 'one or more'-operator; PEG-Grammar-Definition. (will not be used for PyDSL, because it PEG syntax appears to be slightly less readable than classic EBNF

  Finally `component` has been renamed to `name`, i.e. there are some
  parsers that have a `name`. If a parser has a name this is used to
  describe nodes in the S-Expression of XML-Representation of the AST-Tree.
  Only in this latter sense, they are components of the AST-tree, but
  it is nicer to speak of a named parser.
  Names can be assign to Parsers on object initialization, or - more
  elegantly - they will be assigned by instantiating the Grammar class
  (which is always a descendant of the ParserHeadquarter class).
  In this case, those parsers that have been assigned to a
  class variable of the Grammar class will receive the variable's name
  as their parser name. This makes the python-compiled grammars more
  readable, because they are need not to be clutterd with (redundant)
  name assignments.

- Weitere Fehlerkorrekturen; Elimination des "component"-Parameters zugunst der initialisierung des component-Feldes durch die ParserHQ-Klasse vorbereitet -> dient größerer Übersichtlichkeit der
  generierten Parser

- EXPERIMENTELLER Debugging-Code für den Aufrufer-Stapel der Parser in der left_recursion_guard()-Funktion.
- Refactoring, u.a. ParserRoot -> ParserHeadquarter
- compilierungsscripte für a) MLW-Grammatik b) MLW-Einträge mit dieser Grammatik
- Grammatik für MLW erweitert und Beispiel "facitergula.mlw" ausgebaut.