downcase usernames from the admins section in the AppConfig

lib/app_config.rb

@@ -19,6 +19,7 @@ class AppConfig
     generate_pod_uri
     normalize_pod_url
     check_pod_uri
+    downcase_admins
   end
 
   def self.load_config_for_environment(env)
@@ -60,6 +61,11 @@ class AppConfig
     end
   end
 
+
+  def self.downcase_admins
+    self.config_vars[:admins].collect! {|admin| admin.downcase}
+  end
+
   def self.load_config_yaml filename
     YAML.load(File.read(filename))
   end