engine.rb in onebox-1.8.0

- old
+ new

@@ -171,5 +171,6 @@
 require_relative "engine/mixcloud_onebox"
 require_relative "engine/bandcamp_onebox"
 require_relative "engine/coub_onebox"
 require_relative "engine/flickr_onebox"
 require_relative "engine/five_hundred_px_onebox"
+require_relative "engine/pdf_onebox"