Remove 2.1 features from /docs/plugins/codeblock/
Remove further line in /docs/plugins/codeblock/
Remove 2.1 features from /docs/plugins/include-code/
Remove 2.1 features from /docs/plugins/backtick-codeblock/
Merge pull request #16 from octopress/revert-for-2.0

Revert 2.1 code-related features from docs