add twitter, google plus, and facebook sharing
add sharing info to README
add disqus identifier and url
add header extra args
add disqus_title
add more twitter options
add google plus options
remove extra sidebar include in article
Merge pull request #12 from jakevdp/disqus_id

Add explicit disqus identifiers
Merge pull request #13 from jakevdp/extra-header

add header extra args
Merge pull request #14 from jakevdp/remove-extra-sidebar

remove extra sidebar include in article
add default values to social media parameters
add site search
Remove hard connection between SITEURL and 'Blog' in navbar
Squashed changes to octopress pelican theme:

* Disabled disqus for drafts
* Added pelican's css for dictionary lists
* Switched to async Google Analytics code from pelican
Tweaked analytics include to resemble upstream
Merge pull request #17 from synapticarbors/fix-nav

Remove hard connection between SITEURL and 'Blog' in navbar
Merge pull request #18 from netcrusher88/master

Merged in custom updates
remove disqus identifiers.. something wrong with them
Fix article/pages not overriding html title

Due to a recent Jinja update, templates that extend `base.html` can't
override `title` block the included `head.html` anymore. This commit
simply moves everything from head.html to base.html, allowing overriding
again.