Add proper messaging if an organization has gone over the repo limit. This change also moves plan information into the server

data/plans.py

@@ -0,0 +1,47 @@
+import json
+
+USER_PLANS = [
+  {
+    'title': 'Open Source',
+    'price': 0,
+    'privateRepos': 0,
+    'stripeId': 'free',
+    'audience': 'Share with the world',
+  },
+  {
+    'title': 'Micro',
+    'price': 700,
+    'privateRepos': 5,
+    'stripeId': 'micro',
+    'audience': 'For smaller teams',
+  },
+  {
+    'title': 'Basic',
+    'price': 1200,
+    'privateRepos': 10,
+    'stripeId': 'small',
+    'audience': 'For your basic team',
+  },
+  {
+    'title': 'Medium',
+    'price': 2200,
+    'privateRepos': 20,
+    'stripeId': 'medium',
+    'audience': 'For medium-sized teams',
+  },
+]
+
+
+def getPlan(id):
+  """ Returns the plan with the given ID or None if none. """
+  for plan in USER_PLANS:
+    if plan['stripeId'] == id:
+      return plan
+
+  return None
+
+
+def isPlanActive(stripe_subscription):
+  """ Returns whether the plan is active. """
+  # TODO: this.
+  return True