Trying to make travis build the website

For now, pushing updates to leouieda/test

Based on
http://sleepycoders.blogspot.com.au/2013/03/sharing-travis-ci-generated-files.html
and
https://github.com/richfitz/wood
Clone pelican plugins through https
Updated plugin config
Calling update script with bash
Trying to make travis update on PR
Clone plugins into pardir

Also pip install markdown
Only upload sources if not a PR
Missing installs for plugins
Set Travis to push to leouieda.github.com
Added sitemap plugin
Merge pull request #13 from leouieda/travis

Make travis build the website and update the repo