Custom separator and parser.

[mauvm]

Since the name of this package is very generic, it would be nice to be able to specify a separators and parsers. For example, parse front-matter as CSON when a *** separator is used:

***
title: 'Hello'
greatDocumentaries: [
    'earthlings.com'
    'forksoverknives.com'
    'cowspiracy.com'
]
***

# Hello world!

[jxson]

Hmm yeah, I've been thinking about a new version that is a little more configurable and allows better error handling. I agree that this would be a good thing to add/make configurable.