Install html2haml
Convert ERB to Haml
Fix frontmatter in Haml templates converted with html2haml
Use Ruby 1.9-style attributes when possible
Use HTML5 doctype declaration with Haml syntax
Delete unnecessary template files
Set ugly to true to turn off Haml's automatic indentation

- Resolve indentation problems of code in `<pre>` tags
- Improve build process performance
Merge branch 'use-haml'