adding new django version to update procedure, fixing missing deps

conf/requirements.txt

@@ -1,5 +1,6 @@
 Django==1.11.14
 websockify==0.8.0
-gunicorn==19.3.0
-libvirt-python==3.10
+gunicorn==19.9.0
+libvirt-python==4.4.0
 libxml2-python3==2.9.5
+lxml==4.2.3

webvirtcloud/settings.py.template

@@ -83,7 +83,15 @@ TEMPLATES = [
         'BACKEND': 'django.template.backends.django.DjangoTemplates',
         'DIRS': [ os.path.join(BASE_DIR, 'templates'), ],
         'APP_DIRS': True,
-    }
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
 ]
 
 ## WebVirtCloud settings