Rewrite HttpMemoizer to also manage set/get key activities.
Switch fakeweb to webmock
Switch to using celluloid in Prefetcher.update_all
First try for parralell fetching
Remove obsolete code - merging issue.
Use Celluloid Pool to limit number of threads
Allow codeclimate reporting
Merge pull request #1 from brain-geek/celluloid_poller

Make update_all asynchronous by using Celluloid