HTML5 semantic elements

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HTML5 offers some new elements, primarily for semantic purposes. The elements include: `section`, `article`, `aside`, `header`, `footer`, `nav`, `figure`, `figcaption`, `time`, `mark` & `main`.

Further reading:

1. Can I use page for: HTML5 semantic elements
2. Workaround for IE
3. Alternate workaround
4. Article on structural elements
5. has.js test
6. Chrome Platform Status: `<time>` element