Merge pull request daattali#33 from xHN35RQ/master

remove lines that are now defaults in Jekyll 3.0

_config.yml

@@ -5,12 +5,7 @@ author: clay harmon
 simple_search: http://google.com/search
 description: A Jekyll theme for content-rich sites
 name: tufte
-markdown: Kramdown
-kramdown:  
-  input: GFM
-  syntax_highlighter: rouge
 markdown_ext: "markdown,mkdown,mkdn,mkd,md"
-highlighter: rouge
 permalink: /articles/:short_year/:title
 timezone: America/New_York
 excerpt_separator: <!--more-->  # you can specify your own separator, of course.
@@ -28,4 +23,4 @@ transfer:
   command: rsync
   settings: -av
   source: _site/
-  destination: ~/Git/clayh53.github.com/
+  destination: ~/Git/clayh53.github.com/