Allow mustache comments inside the body.

So, it can be nice to link data from a child to the parent. For instance StealJS might have a bunch of layered options. Even DocumentJS has this. It would be great to do something like:

```
@body

## Options

`options` supports options available to [stealTools.grunt.pluginify.output]:

{{#each stealTools.grunt.pluginify.output.params}}
- {{name}} - {{makeTypesString}} - {{firstParagraph description}}
{{/each}}

and to [stealTools.pluginify.options]:

{{#each stealTools.pluginify.options}}
- {{name}} - {{makeTypesString}} - {{firstParagraph description}}
{{/each}}
```

This might require doing markdown processing in the templates as opposed to in "process".