Fixes: Refactor ccREL namespace(ns.html) from XHTML+RDFa (XHTML 4) to HTML+RDFa (HTML 5) and Extend Base Template

Fixes: Refactor ccREL namespace(ns.html) from XHTML+RDFa (XHTML 4) to HTML+RDFa (HTML 5) and Extend Base Template #343