yob/pdf-reader — pull request #67 by paulingham (2012-10-30 14:25:36+00:00)
Title: Only require LRUHash instead of the whole of Hashery

We are having an issue with PDF-reader causing issues with Prawn and a couple of other gems we use due to Hashery being included outright. Instead of including the entire contents of hashery, we only need to include Hashery/LRUHash as no other class/module is used in ObjectCache.

Monkey patching ruby core is bad.