References: #241, #574, #640, #641, #645, #656, #657, #669, #672, #681, #691, #693
* Feature - AWS::AutoScaling - Added support for classic link to launch configurations.
Closes #691.
* Feature - AWS::EC2 - `AWS::EC2::InstanceCollection#create` now passes through the
optional `:client_token`. Resolves #640.
* Feature - AWS::S3 - Added a `:request_payer` option to `AWS::S3::Client#get_object`
that sets the "x-amz-request-payer" header with the given value.
* Issue - AWS::S3 - Resolved an issue with `AWS::S3::Client#get_bucket_location`
for buckets in the eu-central-1 region.
* Issue - AWS::S3 - Backported the "Expect: 100-continue" patch from the v2
AWS SDK for Ruby and enabled expect 100 continue behavior by default
when working with Amazon S3. Fixes #241.
* Issue - AWS::S3 - Added `:secure` to the list of special fields for the
pre-signed post tool. Fixes #641.
* Issue - AWS::S3 - The `AWS::S3::S3Object#restore` method now passes through
all additional options. Fixes #574.
* Issue - AWS::Route53 - Resolved an issue that caused the following code
to raise an error:
```ruby
AWS::Route53.new.hosted_zones.first
#=> was previously raising an ArgumentError
```