Aggiornato file con requirements

I require sono stati portati a Django2

requirements.txt

 appdirs==1.4.2
 cheroot==5.2.0
-Django==1.11.1
+Django==2.0.1
 django-bootstrap3==8.2.3
 django-bower==5.2.0
 django-webpack-loader==0.5.0
@@ -12,6 +12,6 @@ Pillow==4.1.1
 portend==1.8
 psycopg2==2.7
 pyparsing==2.1.10
-pytz==2016.10
+pytz==2017.3
 six==1.10.0
 tempora==1.6.1