refactor!: finish parser migration

Finally! :)

This removes all code related to the old parser.

#65

lib/parser/classes/ReelShelf.js

@@ -0,0 +1,22 @@
+'use strict';
+
+const Parser = require('..');
+const NavigationEndpoint = require('./NavigationEndpoint');
+const Text = require('./Text');
+
+class ReelShelf {
+  type = 'ReelShelf';
+
+  constructor(data) {
+    this.title = new Text(data.title);
+    this.items = Parser.parse(data.items);
+    this.endpoint = data.endpoint ? new NavigationEndpoint(data.endpoint) : null;
+  }
+
+  // XXX: alias for consistency
+  get contents() {
+    return this.items;
+  }
+}
+
+module.exports = ReelShelf;