added comments to imports in core app

bookshare/core/admin.py

+# core django imports
 from django.contrib import admin
+# imports from your apps
 from .models import Student, Course
 
 admin.site.register(Student)

bookshare/core/cas_callbacks.py

-from django.contrib.auth.models import User
+# core django imports
 from django.conf import settings
-
-from .models import Student
-
+from django.contrib.auth.models import User
+# third-part imports
 import requests
+# imports from your apps
+from .models import Student
 
 
 def pfinfo(u_name):

bookshare/core/models.py

+# core django imports
 from django.db import models
 from django.contrib.auth.models import User
-from autoslug import AutoSlugField
-from model_utils.models import TimeStampedModel
 #from django.core.validators import RegexValidator
 from django.core.urlresolvers import reverse
+# third-party imports
+from autoslug import AutoSlugField
+from model_utils.models import TimeStampedModel
 
 
 class Student(TimeStampedModel):
-    user = models.OneToOneField(User)
     # django user includes username, password, first name, and last name
-
-    # implement ratings later
-    #rating = models.IntegerField(null=True, default=0)
+    user = models.OneToOneField(User)
 
     slug = AutoSlugField(populate_from='user', unique=True)
 

bookshare/core/urls.py

+# core django imports
 from django.conf.urls import patterns, url
-from core.views import DetailStudent, StudentRatings
+# imports from your apps
+from .views import DetailStudent, StudentRatings
 
 urlpatterns = patterns('',
     url(r'^(?P<slug>[\w-]+)/$',

bookshare/core/views.py

+# core django imports
 from django.views.generic import DetailView
+# third-party imports
 from braces.views import LoginRequiredMixin
-
-from core.models import Student
+# imports from your apps
+from .models import Student
 from lookouts.models import Lookout
 from trades.models import Listing, Bid, Rating