Connection Pooling about em_aws

[JoshuaOSHickman]

Found the old commit before it was removed. I'd strongly prefer this be an option, even if not the default, but since that connection_pool branch is a little out of date and I only need it for Dynamo (not S3, which seems to have caused some trouble), I'm forking this and making the change there until you feel comfortable enough to make this a non-default option.

[JoshMcKin]

@JoshuaOSHickman would you mind giving the connection pool branch a try?

Thanks,

Josh

[JoshuaOSHickman]

I did so, and had to make a couple changes to make sure it worked well with DynamoDB, I think? It ended up not being helpful from a performance perspective, so I dropped it. Actually, come to think of it, that's pretty much what the docs say, so this should probably be closed.

[JoshMcKin]

Thanks for the update. I've updated the branch and have seen positive results for s3 and SimpleDB results, which locally are much greater than they would be deployed to an AWS EC2 or Heroku like service, but still nice.