Reduce bundle size

- Use the browsers fetch rather than the request module
 - base64-loader -> raw-loader
 - Remove ol3 because it's been broken for a while
 - Removed old GitHub gist support as it's no longer functional
 - Removed Mousetrap as we were only using a small part of the functionality
 - Moved to single js file to make things simplier

src/libs/accessibility.js

@@ -1,8 +1,8 @@
-import lodash from 'lodash'
+import throttle from 'lodash.throttle'
 
 
 // Throttle for 3 seconds so when a user enables it they don't have to refresh the page.
-const reducedMotionEnabled = lodash.throttle(() => {
+const reducedMotionEnabled = throttle(() => {
   return window.matchMedia("(prefers-reduced-motion: reduce)").matches
 }, 3000);