* Added libraries i18nline and preact-i18nline
 * Added a config that adds the preact-i18nline/webpack-loader
 * Added a LanguagePicker component
 * Modified the Header component
    + Translated the links
    + Made it render children
 * Modified the App component
    + Import the i18n index file
    + Added LanguagePicker as a child of Header
    + When language selected, switch locale
    + When locale switched, re-render
 * Added i18n config to package.json
    + auto-translate h1 and Link elements
 * Added folder src/i18n
    + default.json: default translations as extracted from source
    + de.json: German translation messages
    + en.json: English translation messages
    + nl.json: Dutch translation messages
    + index.js: Index file that takes care of config and imports