Markdown syntax decoration related classes.

### Package Specification

The entry point for this class is MarkdownSyntaxDecorator, an implementation of SyntaxDecorator which outputs Markdown syntax from valid XHTML elements. The rest of the package consists of package-private decorators which handle the translation of specific XHTML elements into their corresponding JSPMarkdown syntax markup.

### Related Documentation

See org.apache.wiki.htmltowiki package specification.