Change StandardError to RuntimeError

Since built-in exception "StandardError" does not exist in the latest python version (at least in version 3.3), use RuntimeError instead (which exists from python2.6 to python3.4)
Merge pull request #1118 from yapbreak/patch-1

Change StandardError to RuntimeError
use // instead of explicitly defining http

for twitter as well

update sample output
Merge pull request #1132 from fly/disqus_ssl

use // instead of explicitly defining http
Document video support in Markdown and reST.
Merge pull request #1129 from kdeldycke/markdown-youtube-tip

Document video support in reST & Markdown.
Improve Disqus embed code in notmyidea theme

According to Disqus, the disqus_shortname variable is a required field.
Also added a <noscript> notice for those who have JS disabled.
Add content dir to default settings file template

This adds a line to the settings file generated by pelican-quickstart
that ensures the automatically-generated "content" directory is
specified in said settings file. Fixes #1116