Switched Markdown processor from rdiscount to redcarpet
Fixes for Redcarpet
- Removed unnecessary content filtering for escaping markdown
- Escaping codeblocks defaults to false and can be enabled by passing escape:true
- Backtick codeblocks are automatically escaped when using Textile
- Scoped styling of .highlight divs to figure elements
Merge branch '2.1' of git://github.com/imathis/octopress into 2.1-utc