fog/fog — pull request #2794 by joshgarnett (2014-03-27 20:30:44+00:00)
Title: Adding support for IAM roles and AssumeRole for IAM API

I noticed today that the IAM service does not support IAM roles and credentials from AssumeRole. At first I thought this was a limitation from AWS, but another developer let me know that this works find in boto. So I've gone ahead and tossed together a patch, which adds this support. I've tested it using ~./fog credentials and an IAM role. The unit tests still run correctly also.