added functionality to favorite a song. fixes #323

src/models/mediaInfo.ts

@@ -10,4 +10,5 @@ export interface MediaInfo {
   current: string;
   duration: string;
   image: string;
+  favorite: boolean;
 }

src/models/options.ts

@@ -9,4 +9,5 @@ export interface Options {
   "app-name": string;
   image: string;
   icon: string;
+  favorite: boolean;
 }