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
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
Don't enforce the licence to be AGPL.
Also update the LICENSE file