engine.rb in onebox-1.5.7

- old
+ new

@@ -139,5 +139,6 @@
 require_relative "engine/youtube_onebox"
 require_relative "engine/youku_onebox"
 require_relative "engine/douban_onebox"
 require_relative "engine/whitelisted_generic_onebox"
 require_relative "engine/pubmed_onebox"
+require_relative "engine/google_calendar_onebox"