Don't panic if we didn't load stripe. (Makes game run offline).

app/core/services/stripe.coffee

@@ -1,15 +1,18 @@
 publishableKey = if application.isProduction() then 'pk_live_27jQZozjDGN1HSUTnSuM578g' else 'pk_test_zG5UwVu6Ww8YhtE9ZYh0JO6a'
 
-module.exports = handler = StripeCheckout.configure({
-  key: publishableKey
-  name: 'CodeCombat'
-  email: me.get('email')
-  image: "https://codecombat.com/images/pages/base/logo_square_250.png"
-  token: (token) ->
-    console.log 'trigger?', handler.trigger
-    handler.trigger 'received-token', { token: token }
-    Backbone.Mediator.publish 'stripe:received-token', { token: token }
-  locale: 'auto'
-})
-
+if StripeCheckout?
+  module.exports = handler = StripeCheckout.configure({
+    key: publishableKey
+    name: 'CodeCombat'
+    email: me.get('email')
+    image: "https://codecombat.com/images/pages/base/logo_square_250.png"
+    token: (token) ->
+      console.log 'trigger?', handler.trigger
+      handler.trigger 'received-token', { token: token }
+      Backbone.Mediator.publish 'stripe:received-token', { token: token }
+    locale: 'auto'
+  })
+else
+  module.exports = {}
+  console.error "Failure loading StripeCheckout API, returning empty object."
 _.extend(handler, Backbone.Events)