By leaving 'simple_search' parameter blank in the _config.yml file, the
search form in the navigation.html include is omitted. This lets you
put your own custom search form in the custom/navigation.html file.
2. Fixed Newer pagination link on page 2
3. Improved sidebar section breakdown on collapse
4. Removed sharing links from the blog index page (moved to pages)
5. Improved styling for metadata on the blog index
6. Moved /blog/archives.html to /blog/archives/index.html
7. Improved responsive layout styling bugs
