- renamed parser.py to parsercombinators.py to avoid possible name conflicts with the parser module from the Python standard library

- split ParserCombinators.py into different modules: version, logging, syntaxtree, parser, EBNFcompiler, DSLsupport, dhparser

- renamed project to "DHParser" to avoid conflict with an existing Python Project named "PyDSL"; also, it makes it clearer that this project is about the digital humanities
- Extended the README.md file

- 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

- 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.