Escape page title
Change Twitter share to use tags as hashtags.

Changes the twitter link to use tags instead of categories when
creating the hashtags in the link.
Also removes spaces in tags with multiple words.

For example:

post tags           | twitter hashtags
-----------------------------------------
[open source]       | #opensource
[java]              | #java
[open source, java] | #opensource #java
----------------------------------------
Update theme to support Jekyll 2.x newness
- Cleanup _config.yml
- Move navigation and author info to data files
- Convert .less stylesheets to .scss
- Update documentation
- Include Octopress gem for new post/page creation
Exclude vendor
Add support for Google AdSense banners
- Variables for _config.yml
- Includes for sidebar and footer banners
Remove "article" from next/previous links
Fix Google+ footer link
Apply author override to posts in feed