A few key strokes to convert IPython notebooks to markdown and serve in Jekyll, per http://cscorley.github.io/2014/02/21/blogging-with-ipython-and-jekyll/. Pics and GitHub markdown style triple backtick code blocks with line numbers are supported.

jekyll.py

try:
    from urllib.parse import quote  # Py 3
except ImportError:
    from urllib2 import quote  # Py 2
import os
import sys

try:
    BLOG_DIR = os.environ['BLOG_DIR']
except KeyError:
    BLOG_DIR = '.'
    print("Cannot find environment variable $BLOG_DIR. Use the current directory to output.")

f = None
for arg in sys.argv:
    if arg.endswith('.ipynb'):
        f = arg.split('.ipynb')[0]
        break

c = get_config()
c.NbConvertApp.export_format = 'markdown'
home = os.path.expanduser("~")
c.MarkdownExporter.template_path = [os.path.join(home, '.ipython/templates')]
c.MarkdownExporter.template_file = 'jekyll'
#c.Exporter.file_extension = 'md'

def path2support(path):
    """Turn a file path into a URL"""
    parts = path.split(os.path.sep)
    return os.path.join("{{ '/notebooks/' | prepend: site.baseurl }}", *[quote(part) for part in parts])

c.MarkdownExporter.filters = {'path2support': path2support}

if f:
    c.NbConvertApp.output_base = f.lower().replace(' ', '-')
    c.FilesWriter.build_directory = os.path.join(BLOG_DIR, 'notebooks')

jekyll.tpl

{% extends 'display_priority.tpl' %}

{%- block header -%}
---
layout: post
title: "{{resources['metadata']['name']}}"
tags: python
---
{%- endblock header -%}

{% block in_prompt %}
**In [{{ cell.prompt_number }}]:**
{% endblock in_prompt %}

{% block output_prompt %}
{%- endblock output_prompt %}

{% block input %}
{{ '{% highlight python linenos %}' }}
{{ cell.input }}
{{ '{% endhighlight %}' }}
{% endblock input %}

{% block pyerr %}
{{ super() }}
{% endblock pyerr %}

{% block traceback_line %}
{{ line | indent | strip_ansi }}
{% endblock traceback_line %}

{% block pyout %}

{% block data_priority scoped %}
{{ super() }}
{% endblock %}
{% endblock pyout %}

{% block stream %}
{{ output.text | indent }}
{% endblock stream %}

{% block data_svg %}
![svg]({{ output.svg_filename | path2support }})
{% endblock data_svg %}

{% block data_png %}
![png]({{ output.png_filename | path2support }})
{% endblock data_png %}

{% block data_jpg %}
![jpeg]({{ output.jpeg_filename | path2support }})
{% endblock data_jpg %}

{% block data_latex %}
{{ output.latex }}
{% endblock data_latex %}

{% block data_html scoped %}
{{ output.html }}
{% endblock data_html %}

{% block data_text scoped %}
{{ output.text | indent }}
{% endblock data_text %}

{% block markdowncell scoped %}
{{ cell.source | wrap_text(80) }}
{% endblock markdowncell %}


{% block headingcell scoped %}
{{ '#' * cell.level }} {{ cell.source | replace('\n', ' ') }}
{% endblock headingcell %}

{% block unknowncell scoped %}
unknown type  {{ cell.type }}
{% endblock unknowncell %}

markdown_highlight.py

#!/usr/bin/env python

# This searches the converted .md file for GitHub style markdown backquotes (e.g. ```python)
# and converts them into Liquid tags {% highlight xxx %} depending on the language specified.
#
# put this file to your PATH and `chmod +x markdown_highlight.py`

import sys

for filename in sys.argv[1:]:
    print("Markdown highlight script is processing " + filename + "...")
    with open(filename) as f:
        fl = f.readlines()

    langs = ['python', 'bash', 'R']

    i = 0
    while i < len(fl):
        stripped = fl[i].strip()
        for lg in langs:
            if stripped == '```' + lg:
                print("Converted backquotes" + stripped)
                fl[i] = '{% highlight '+ lg + ' linenos %}\n'
                i += 1
                while i < len(fl):
                    stripped = fl[i].strip()
                    if stripped == '```':
                        print("Converted corresponding backquotes" + stripped)
                        fl[i] = '{% endhighlight %}\n'
                        break
                    i += 1
        i += 1

    with open(filename, 'w') as f:
        f.writelines(fl)

nbconvert.sh

#!/usr/bin/env bash

# This shell wrapper is what you would use every day to convert a .ipynb to a .md file 
# with supporting files (imgs) in a directory called `notebooks` in `$BLOG_DIR`, and move
# only the .md file in it to `$BLOG_DIR/_drafts/`. The supporting files will remain in
# `$BLOG_DIR/notebooks/` and be served by Jekyll.
#
# put this file to your PATH and `chmod +x nbconvert.sh`
#
# change this variable to your site directory here. Or `notebooks/`will be created where you
# execute the script.
export BLOG_DIR="."

ipython nbconvert --config jekyll.py "$@";
echo
markdown_highlight.py ${BLOG_DIR}/notebooks/*.md
echo
mv ${BLOG_DIR}/notebooks/*.md ${BLOG_DIR}/_drafts/
echo ".md files are moved from ${BLOG_DIR}/notebooks/ to ${BLOG_DIR}/_drafts/"
cp "$@" ${BLOG_DIR}/notebooks/
echo "$@" "is/are moved to ${BLOG_DIR}/notebooks/"