Use RequestContext in all render_to_response()

We have {% csrf_token %} in a templates, but the context in
render_to_response() does not provide the value.

https://docs.djangoproject.com/en/1.5/ref/contrib/csrf/

pyi2phosts/jump/views.py

@@ -4,6 +4,7 @@ from django.shortcuts import render_to_response
 from django.shortcuts import redirect
 from django.core.exceptions import ValidationError
 from django.conf import settings
+from django.template import RequestContext
 
 from pyi2phosts.postkey.models import i2phost
 from pyi2phosts.lib.validation import validate_hostname
@@ -16,13 +17,13 @@ def jumper(request, host):
 		return render_to_response('jump-error.html', {
 			'title': settings.SITE_NAME,
 			'error': e,
-			})
+			}, context_instance=RequestContext(request))
 	try:
 		h = i2phost.objects.get(name=hostname)
 	except i2phost.DoesNotExist:
 		return render_to_response('jump-unknown.html', {
 			'title': settings.SITE_NAME,
-			})
+			}, context_instance=RequestContext(request))
 	if h.activated == True:
 		key = h.b64hash
 	else:
@@ -47,7 +48,7 @@ def jumper(request, host):
 	return render_to_response('jump.html', {
 		'title': settings.SITE_NAME,
 		'url': url,
-		})
+		}, context_instance=RequestContext(request))
 
 def index(request):
 	return redirect('/')

pyi2phosts/postkey/views.py

@@ -106,7 +106,7 @@ def success(request):
 		return render_to_response('success_submission.html', {
 			'title': settings.SITE_NAME,
 			'hostname': hn,
-			})
+			}, context_instance=RequestContext(request))
 	else:
 		return redirect('/')
 
@@ -136,7 +136,7 @@ def subdomain(request):
 					return render_to_response('subdomain_http_verify_failure.html', {
 						'title': settings.SITE_NAME,
 						'code': e.code,
-						})
+						}, context_instance=RequestContext(request))
 			else:
 				log.debug('subdomain verification success, saving host')
 				s = save_host(request)