Improve responsive design and style modifications

[ppalazon]

This is a list of improvements

• Fonts size based on width size
• Faviconit.com generate icon preparation
• Improve section and single partial for non post articles
• Improve navegation
• CSS improve modifications
• Change homepage
• Add CSS generated for ox-hugo exporter (emacs org-mode)
• Solving problems with heroimage
• Add social link at bottom
• Change some partials

Thanks so much for this hugo theme, this is awesome.