5.2.0
Update the high resolution media query
Docs: Make minor improvements
Change project architecture
Update to Modernizr 2.8.3
Minor fix: Use short version of shorthand for margin declaration in 404 template
Rename Apple touch icon & add <link> in index.html
Use `https://` where possible
Docs: Use `https://` where possible
Deprecate protocol-relative URLs
Further losslessly compress images
