Add A1 SC + site link

Author: parthsarin

.DS_Store

@@ -7,17 +7,17 @@
         "released": "2020-01-06 5:00:00 PM",
         "due": "2020-01-21 11:59:59 PM",
         "visible": true,
-        "active": true
+        "active": false
     },
     {
         "num": 1,
         "title": "Cryptography",
         "spec": "https://github.com/stanfordpython/python-assignments/blob/master/assign1/README.md",
-        "starter_code": "https://github.com/stanfordpython/python-assignments/tree/master/assign1",
+        "starter_code": "https://stanfordpython.com/res/starter-code/assign1.zip",
         "released": "2020-01-20 5:00:00 PM",
         "due": "2020-02-04 11:59:59 PM",
-        "visible": false,
-        "active": false
+        "visible": true,
+        "active": true
     },
     {
         "num": 2,