Frontent dev env (#247)

* Added frontend development files/environment

* More items-categories related removals

* Improvements in pages templates (inc. static pages)

* Improvements in video player

* Added empty home page message + cta

* Updates in media, playlist and management pages

* Improvements in material icons font loading

* Replaced media & playlists links in frontend dev-env

* frontend package version update

* chnaged frontend dev url port

* static files update

* Changed default position of theme switcher

* enabled frontend docker container

frontend/packages/vjs-plugin-font-icons/Gruntfile.js

@@ -0,0 +1,8 @@
+require('@babel/register');
+
+module.exports = function(grunt) {
+  require('time-grunt')(grunt);
+  require('load-grunt-tasks')(grunt);
+
+  require('./lib/grunt.js')(grunt);
+};