Added update and delete function functionallity

ref #4

src/controllers/TrackController.ts

@@ -40,10 +40,16 @@ export class TrackController {
   @Put(":id")
   put(@Param("id") id: number, @Body() user: any) {
     return "Updating a user...";
+  @Put("/:id")
+  put(@Param("id") id: number, @EntityFromBody() track: Track) {
+    return this.trackRepository.update({id: id}, track);
   }
 
   @Delete(":id")
   remove(@EntityFromParam("id") track: Track) {
     return this.trackRepository.delete(track);
+  @Delete("/:id")
+  remove(@Param('id') id: number) {
+    return this.trackRepository.delete({id: id});
   }
 }