Feature Request: differentiate function/class definition

[aaronmccall]

It would be nice to be able to mark the code/comment pair as being for a class/function definition for the purpose of tweaking the HTML output (bottom aligning the block so that it's more obvious that the comment text is a definition header comment).

Thoughts:

• Use a regex in the language definition that indicates a "start of code block" that means that our comment is a header comment
• Add a class name to the HTML output for style/behavior hooks