Markdown Guide

[Pamasich]

Provide a guide for new users on what markdown they can use to achieve a desired result.

[aclist]

I was actually thinking about creating a preview pane on post fields that would display a rendered view of what the markdown is expected to look like, akin to the preview field seen here on GitHub. But this requires at least a barebones parser that will iterate through all the possible markdown combinations and then convert them to equivalent HTML objects, then insert the prepared HTML body into the preview pane.