__init__.py

from .yaml_reader import *

gistfile1.txt

Howto: 

- Clone the original pelican-plugins repo if you dont already have it 
  https://github.com/getpelican/pelican-plugins

- Create a new yaml directory inside pelican-plugins and add the 2 .py files. 

- Update your pelicanconfig.py. Don't forget the MARKUP line!

pelicanconfig.py

PLUGIN_PATH = 'path/to/pelican-plugins'
PLUGINS = ['yaml-reader']
MARKUP = ('rst', 'md', 'yml')

yaml_reader.py

# -*- coding: utf-8 -*-

"""
Yaml plugin for pelican
=======================

Based on
http://www.ian-barton.com/posts/2013/Apr/06/blogging-with-emacs-org-mode-and-pelican/
https://github.com/getpelican/pelican/issues/607

"""

from __future__ import unicode_literals

import os
import logging

from pelican import signals
from pelican.readers import EXTENSIONS, Reader

try:
    import yaml
    Yaml = True # NOQA
except ImportError:
    Yaml = False # NOQA

class YamlReader(Reader):
    enabled = bool(Yaml)
    file_extensions = ['yml']
    def read(self, filename):
        """Parse content and metadata of YAML files"""
        raw = open(filename).read()
        docs = []
        metadata = {}
        raw_doc = raw.split('---')
        docs.append(yaml.load(raw_doc[1]))

        md = docs[0]

        # yaml returns date as a datetime.datetime object.
        # We need to turn this back into a string.
        md['date'] = md['date'].strftime('%Y-%m-%d')

        for key, value in md.items():
            name = key.lower()
            # Process article tags.
            if name == "tags":
                tags = ''
                for item in value.split(','):
                    tags = tags + ", " + unicode(item)
                metadata[name] = self.process_metadata(name, tags)
            else:
                metadata[name] = self.process_metadata(name, unicode(value))

        udata = raw_doc[2].decode("utf-8")
        # asciidata = udata.encode("ascii", "ignore")
        return udata, metadata 
 
def get_generators(generators):
    # define a new generator here if you need to
    return generators
 
def add_reader(arg):
    EXTENSIONS['yml'] = YamlReader
 
def register():
    signals.get_generators.connect(get_generators)
    signals.initialized.connect(add_reader)