Add AWS::STS::Client#assume_role_with_web_identity
Fix example for instance collection to correspond documentation
Merge pull request #254 from alex-slynko-wonga/fix_documentation

Fix example for instance collection to correspond documentation
Merge branch 'sts-update' into release/1.11.0
Bump version to 1.11.0
Added documentation for ActivityTask#respond
AWS::DynamoDB::ItemCollection#query now accepts :attributes_to_get.

Fixes #252
The ":region" attribute is a bit out of place, as
none of the other attributes are referred to by
symbol. I've corrected this.
Resolved issue with crc32 checks and Ruby 2.0.0

Fixes #243
Fixed unit test for the net http handler.
Merge pull request #258 from EronHennessey/master

Small updates to docs