edited models.py, added Artist, Album, Song models

tanyayotoko_music/about/models.py

 from django.db import models
 
-# Create your models here.
+class Artist(models.Model):
+	artist_name = models.TextField()
+	monthly_listeners = models.IntegerField()
+
+class Album(models.Model):
+	album_name = models.TextField()
+	artist = models.TextField()
+	description = models.TextField()
+	release_date = models.DateField()
+
+class Song(models.Model):
+	song_title = models.TextField()
+	artist = models.TextField()
+	album = models.TextField()
+	song_length = models.IntegerField()
+