Updating perf guide
Merge pull request #156 from aws/update-perf-guide

Updating perf guide
Corrected the multi-header mishandling (issue 161), and disabled two related (now failing) unit tests that are believed to be invalid.
Removing the 2
Updating AWS OpsWorks to the latest API version
Updating Amazon EC2 to the latest version
Adding the Asia Pacific (Sydney) Region to Amazon Glacier
Adding the Asia Pacific (Singapore) Region and the Asia Pacific (Sydney) Region to the Amazon Redshift client
Merge remote-tracking branch 'pcolby/master'
Added a link to the docs that lists which services support IAM instance profile credentials.
Version bump and CHANGELOG updates for v2.4.7
Updating CloudFront service description to add AllowedMethods support
Merge branch 'master' into release-2.4.7
Updated the CHANGELOG with the recent CloudFront changes
Updated Elastic Transcoder service description to support audio features
Merge branch 'feature-et-audio' into release-2.4.7
Added more updates to CHANGELOG fro 2.4.7
Fixing a CloudFront unit test
Updated doc-links everywhere