Updated the API reference generator to support recursive shapes.

Previous updates added support to Seahorse::Model::Shapes for
recursion. This change ensures the API reference documenter
stops denormalizing docs when a recursive shape is encountered.
Updated Aws::AutoScaling::Client API.

Added support for DetachInstances, Enter/Exit Standby, and Lifecycle
hooks.
Added support for Amazon Route53 Domains.
Updated the XML builder to support XML namespaces that do not have a prefix.
Updated Aws::Route53::Client API to support geo locations.
Fixed a YAML formatting issue that caused a spec failure in Ruby 2.1.1

A date value was getting loaded as a string from the YAML
document, instead of as a Time object. This only seemed to affect
Ruby 2.1.1.
Merge branch 'route53-domains'
Minor bugfix for `Aws::EC2::Client#describe_network_interface_attribute

Corrected the input format for this operation to match
the API. Also includes a few minor documentation updates.
Minor API documentation update for Aws::CloudTrail::Client.
Added support to Aws::ElastiCache::Client for the new 2014-07-15 API version.
Updated the API models for a number of services for documentation updates.
A number of bug fixes in the paginator configurations.
Tag release v2.0.0.rc13

References:
  #61, #70, #71, #74, #76, #77, #78, #79, #81, #82, #85, #86,
  #87
Updated the API reference generator to support recursive shapes.

Previous updates added support to Seahorse::Model::Shapes for
recursion. This change ensures the API reference documenter
stops denormalizing docs when a recursive shape is encountered.
Updated Aws::AutoScaling::Client API.

Added support for DetachInstances, Enter/Exit Standby, and Lifecycle
hooks.
Added support for Amazon Route53 Domains.
Updated the XML builder to support XML namespaces that do not have a prefix.
Updated Aws::Route53::Client API to support geo locations.
Fixed a YAML formatting issue that caused a spec failure in Ruby 2.1.1

A date value was getting loaded as a string from the YAML
document, instead of as a Time object. This only seemed to affect
Ruby 2.1.1.
Minor bugfix for `Aws::EC2::Client#describe_network_interface_attribute

Corrected the input format for this operation to match
the API. Also includes a few minor documentation updates.