Function prettify

scripts/build.js:15–19

(str)

// `i-am-article` becomes `I Am Article`
function prettify(str) {
    return str.split('-').map(function capitalize(part) {
        return part.charAt(0).toUpperCase() + part.slice(1);
    }).join(' ');
}

// Folder name 'ui-examples' becomes 'ui' (the way it should be displayed in the documentation tree)
function updateSubfoldersName(str) {