add support for front-matter

[lazabogdan]

Hey guys,

Would you be interested in merging this?
It adds support for front-matter:

• https://www.npmjs.com/package/front-matter (assigns context from YAML metadata)
• https://www.npmjs.com/package/front-matter-loader

It allows for templates like this:

---
title: Just hack'n
description: Nothing to see here
---
 
<h1>{{ title }}</h1>
<p>{{ description }}</p>

[jeremyzahner]

Hi @lazabogdan

Thanks for submitting the PR!

I would love to have the following improvements:

• Add some examples (or at least a reference) to the Readme.
• Add some inline documentation