pokeb/asi-http-request — pull request #303 by abillingsley (2012-01-19 19:46:09+00:00)
Title: Add support for x-amz-security-token header

From Amazon Docs:
http://docs.amazonwebservices.com/AmazonS3/latest/dev/RESTAuthentication.html

### Using Temporary Security Credentials

If you are signing your request using temporary security credentials (see Making Requests), you must include the corresponding security token in your request by adding the x-amz-security-token header.