Added a readme

README.md

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+This is a sample project that illustrates some strange behavior I ran into trying to upload files to Amazon S3 using [EventMachine][http://rubyeventmachine.com/] and the [happening][http://github.com/peritor/happening] non-blocking S3 client.
+
+You need to update the s3.yml file with your S3 account information and run `bundle install`. Then you can run either of the two included scripts:
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+`ruby lib/http_upload.rb`
+
+or
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+`ruby lib/https_upload.rb`
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+On my machine (Mac OS X) when I run the **https** script the CPU spikes to 100% and the event loop is blocked for a couple of minutes before the file starts to transfer. However, the **http** version does not block the event loop, uses almost no CPU, and starts transferring data right away.