Adding new plugin Code Include

This plugin allows you to include other files as a code block with
syntax highlighting in ReST articles. You'll need docutils>0.10, as
there was a circular import bug in the 0.10 release.
Some minor tweaks: documentation, py3 compliance

Pulled most documentation out of code to avoid desync
Fixed unicode literals
Fixed except syntax for py3 compliance
PEP 8 fixes
initial commit of disqus_static plugin, a plugin for allowing you to fetch disqus comments from their API and embed them into your templates at HTML generation time.
fix README markdown display
make the disqus_static plugin work for sites with over 25 comments
Whitespace fixes
add support for child posts
Adding LICENSE file for Affero GPL
Merge pull request #15 from abackstrom/affero-gpl

Adding LICENSE file for Affero GPL
import plugins from core and restructure repo
move tests to plugin folder
teach plugins with dependencies to behave
Merge pull request #18 from avaris/import-plugins

Import plugins and restructure repository
Adds Extract table of contents plugin
add w3c validator plugin
Merge pull request #19 from zemanel/w3c-validator-plugin

add w3c validator plugin
Minor improvements to W3C Validator plugin README
Ability to add latex to pages
Correct error in documentation