created bookshelf app

nishaespera_reading/bookshelf/admin.py

+from django.contrib import admin
+
+# Register your models here.

nishaespera_reading/bookshelf/apps.py

+from django.apps import AppConfig
+
+
+class BookshelfConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'bookshelf'

nishaespera_reading/bookshelf/models.py

+from django.db import models
+
+# Create your models here.

nishaespera_reading/bookshelf/tests.py

+from django.test import TestCase
+
+# Create your tests here.

nishaespera_reading/bookshelf/views.py

+from django.shortcuts import render
+
+# Create your views here.