Implemented dispose pattern
clean up code
added test
added test
fixed copy and paste error
added logger
* DocMarkdownNodeParserTest.cs: added test

* DocToMarkdown.Tests.csproj:
added logger to DocMarkdownNodeParser
added test
added test
fixed bug
added test, but is ignored for now.
added test
added test
Little typo fix
added test
added tests
Fixed little bug
added test
Modifications for style cop