Split up our plex and tmdb classes into more logical files with a common media class that it extends off of.

seasoned_api/src/media_classes/plex.js

@@ -0,0 +1,22 @@
+
+const Media = require('src/media_classes/media');
+
+class Plex extends Media {
+   constructor(title, year, type, summary, poster_path, background_path, added, seasons, episodes) {
+      super(title, year, type);
+
+      this.summary = summary;
+      this.poster_path = poster_path;
+      this.background_path = background_path;
+      this.added = added;
+
+      this.seasons = seasons;
+      this.episodes = episodes;
+   }
+
+   print() {
+      super.print();
+   }
+}
+
+module.exports = Plex;