Site is as functional as before (resolves #47)

Finished setting up graphs app and getting data from API app. Only issue
now is this branch is behind a few commits from other branches.

graphs/urls.py

@@ -4,10 +4,10 @@ from .views import *
 
 app_name = 'graphs'
 urlpatterns = [
-    path('artists/<str:user_secret>', artist_data, 
+    path('artists/<str:user_secret>', display_artist_graph, 
         name='display_artist_graph'),
     path('genre/<str:user_secret>', display_genre_graph,
         name='display_genre_graph'),
-    path('audio_features/<str:user_secret>', audio_features,
+    path('audio_features/<str:user_secret>', display_features_graphs,
         name='display_audio_features'),
 ]