Move rouge loading
Extract plugin management into its own class.
Require 'plugin_manager' in lib/jekyll.rb
Strip content of the {% highlight %} block

A fix for #1801
STRIP ALL THE NEWLINES FROM HIGHLIGHTED CODE ok just the ones at the beginning and end
Expect 41 posts, not just 40.
Merge pull request #1823 from jekyll/highlight-without-newline
Update history to reflect merge of #1823 [ci skip]
Fetching/determining the plugin path is beyond this it's kind of sad.
Ok handle the plugins_path stuff in the PluginManager.
Merge pull request #2197 from jekyll/plugin-manager
Update history to reflect merge of #2197 [ci skip]
Merge pull request #2189 from benhanzl/move_rouge_loading
Update history to reflect merge of #2189 [ci skip]
Update history to reflect merge of #2206 [ci skip]
Remove duplicate entry in list of third-party plugins (#2206)
Move vendor prefixed properties before the unprefixed ones.
Use the shorthand font property when possible.

Conflicts:
	site/_includes/css/style.css
Be explicit with the `background` property.
Remove units from zero.