Merge pull request #4 from AndreasAugustin/development

added .gitignore and stylecop Settings.StyleCop
Merge pull request #5 from AndreasAugustin/development

Development
Merge pull request #6 from AndreasAugustin/development

Development
Merge pull request #7 from AndreasAugustin/development

Development
Merge pull request #8 from AndreasAugustin/development

Merge development into master
Merge pull request #10 from AndreasAugustin/development

Development into master
Update README.md
clean up
* PermissionMarkdownNodeParserTest.cs: added test

* MarkdownNodeParserPool.cs:
* PermissionMarkdownNodeParser.cs: implemented permission markdown
  node parser

* DocToMarkdown.Tests.csproj: added test for permission markdown node
  parser