Add debug info on ajax errors

app/adapters/application.coffee

@@ -20,4 +20,9 @@ Adapter = DS.ActiveModelAdapter.extend
   findMany: (store, type, ids) ->
     @ajax(@buildURL(type.typeKey), 'GET', data: { ids: ids })
 
+  handleResponse: (status, headers, payload) ->
+    if status > 299
+      console.log "[ERROR] API responded with an error (#{status}): #{JSON.stringify(payload)}"
+    return @_super.apply(this, arguments)
+
 `export default Adapter`

app/utils/ajax.coffee

@@ -68,6 +68,7 @@ ajax = Em.Object.create
     options.error = (data, status, xhr) =>
       Travis.lookup('controller:flash').pushObject(data.flash) if data?.flash
       delete data.flash if data?
+      console.log "[ERROR] API responded with an error (#{status}): #{JSON.stringify(data)}"
       error.apply(this, arguments)
 
     options = $.extend(options, default_options)