Change database settings

Edited settings.py to use PostgreSQL. Made some minor changes
in views.py to incorporate the new models.

musicvis/settings.py

@@ -76,8 +76,12 @@ WSGI_APPLICATION = 'musicvis.wsgi.application'
 
 DATABASES = {
     'default': {
-        'ENGINE': 'django.db.backends.sqlite3',
-        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
+        'ENGINE': 'django.db.backends.postgresql_psycopg2',
+        'NAME': 'spotifyvis',
+        'USER': 'django',
+        'PASSWORD': 'django',
+        'HOST': 'localhost',
+        'PORT': '', 
     }
 }