Markdown support for a:documentation content

[ghost]

So, the <a:documentation/> element is defined quite rigidly as an element not allowing child elements. Nevertheless, I found myself wanting to spruce up the documentation with some formatting. Given how I was using the compact RNC syntax anyway, I just started using Markdown syntax. The outcome is better than nothing at all, I suppose, but it's definitely not properly formatted (it just looks like a plain-text mail).

If possible, it would be great if Markdown could optionally be enabled via a --markdown switch. I guess this could be done from the XSLT via an LXML custom function that hooks into a Python Markdown library.