Merge pull request #52 from infieldai/psych4-support

Add support for psych 4.0

Author: kookster

lib/activemessaging/gateway.rb

@@ -368,7 +368,7 @@ def current_processor_group
       end
 
       def load_connection_configuration(label='default')
-        @broker_yml = YAML::load(ERB.new(IO.read(File.join(ActiveMessaging.app_root, 'config', 'broker.yml'))).result) if @broker_yml.nil?
+        @broker_yml = YAML::load(ERB.new(IO.read(File.join(ActiveMessaging.app_root, 'config', 'broker.yml'))).result, aliases: true) if @broker_yml.nil?
         if label == 'default'
           config = @broker_yml[ActiveMessaging.app_env].symbolize_keys
         else