added cacheing to three page

bookshare/core/urls.py

 # core django imports
 from django.conf.urls import patterns, url
+from django.views.decorators.cache import cache_page
 # imports from your apps
 from .views import DetailStudent, StudentRatings
 
@@ -8,5 +9,5 @@ urlpatterns = patterns('',
         DetailStudent.as_view(), name='profile'),
 
     url(r'^(?P<slug>[\w-]+)/ratings/$',
-        StudentRatings.as_view(), name='ratings'),
+        cache_page(60 * 5)(StudentRatings.as_view()), name='ratings'),
 )

bookshare/settings/urls.py

@@ -4,6 +4,7 @@ from django.views.generic import TemplateView
 from django.conf.urls.static import static
 from django.conf import settings
 from django.contrib import admin
+from django.views.decorators.cache import cache_page
 # imports from your apps
 from .views import HomepageView, ChartsView
 
@@ -25,7 +26,7 @@ urlpatterns = patterns('',
 
     # site-wide pages
     url(r'^$', HomepageView.as_view(), name='homepage'),
-    url(r'^charts/?$', ChartsView.as_view(), name='charts'),
+    url(r'^charts/?$', cache_page(60 * 15)(ChartsView.as_view()), name='charts'),
 
     # static pages
     url(r'^about/?$', TemplateView.as_view(template_name='about.html'),

bookshare/trades/urls.py

 # core django imports
 from django.conf.urls import patterns, url
+from django.views.decorators.cache import cache_page
 # imports from your apps
 from .views import ListListings, CreateListing, ListingPage,\
     CreateFlag, DeleteFlag, EditListing, SellListing,\
@@ -9,7 +10,7 @@ from .views import ListListings, CreateListing, ListingPage,\
 
 urlpatterns = patterns('',
     url(r'^all/$',
-        ListListings.as_view(), name='list_listings'),
+        cache_page(60 * 5)(ListListings.as_view()), name='list_listings'),
 
     url(r'^new/$',
         CreateListing.as_view(), name='create_listing'),