add twitter, google plus, and facebook sharing
add sharing info to README
add more twitter options
add google plus options
add default values to social media parameters
add site search
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.
fix image path and compiled the css without debug info
Merge pull request #20 from nhanb/cope-with-jinja-update

Fix article/pages not overriding html title
Restore disqus js variables

disqus_identifier now doesn't include SITEURL for portability
Merge pull request #22 from nhanb/restore-disqus-variables

Restore disqus js variables
added "new style" analytics to google analytics
see
https://developers.google.com/analytics/devguides/collection/analyticsjs/advanced
in particular, note:
"It is perfectly safe to include both ga.js and analytics.js snippets on
the same page."
Add latex support.
Merge pull request #25 from calfzhou/latex

Add latex support.
Add license