Cleanup and app size reduction

Removed extra copy of Samples and Example directories saving storage space, removed unused .meta files from Unity streaming directory. You can delete the files from the Quest using the file system and it will regenerate them for you. Removed the velocity based drum sticks for now, need to make something more robust, effect is not reliable. Tried to get help Video Player working, works fine on windows but not on the Quest, tried several video formats, will need to come back to this later.