Import enhancements/ fixes from `nfreear.github.io`

[nfreear]

• – Favicon image ... prevent 404 error – Favicon image ... prevent 404 error nfreear/nfreear-blog#10
• – basic Google Analytics;
• – Custom nav.; site-message;
• – Google Analytics for downloads / install of bookmarklet ...? TODO
• – ...?

• https://img.shields.io/badge/wiki-AW-darkorange.svg
• https://img.shields.io/badge/wiki-AW-00008B.svg#DarkBlue
• https://css-tricks.com/snippets/css/named-colors-and-hex-equivalents/
• http://www.favicomatic.com/
• http://stackoverflow.com/questions/6121725/favicon-ico-or-png-correct-tags
• http://realfavicongenerator.net/favicon_checker?site=http%3A//accessifywiki.github.io#.VrOFb7KLSUl
• http://seositecheckup.com/seo-audit/favicon-test/accessifywiki.github.io

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• See: @nfreear/nfreear.github.io