set-up list.txt with proper permissions

setup.py

@@ -8,6 +8,11 @@ if sys.version_info > (3,0):
 
 from setuptools import setup, find_packages
 
+if not os.path.exists("Music"):
+        os.makedirs("Music")
+open('Music/list.txt', 'a').close()
+os.system('sudo chmod 777 Music/list.txt')
+
 setup(name='spotdl',
       version='0.1',
       description='Downloads Songs and Spotify playlists (even for free accounts)',