Add events section (#18)

* Add events section

* Try build fix

* Header improvements

* Update almost everything

postcss.config.js

@@ -4,6 +4,7 @@ module.exports = {
   plugins: [
     require('autoprefixer'),
     require('postcss-import'),
+    require('postcss-extend'),
     require('postcss-nesting'),
     mediaVariables,
     require('postcss-custom-media'),