Add batch actions and waiters to resource model.

This adds definitions to the internal resource model to handle batch actions
and waiters, both of which are recent additions to the resource JSON format.
This change is a prerequisite to adding support for these features in the
resource class factory. Tests are added for the new model features.
Update requirements to head of develop branches
Blacklist IAM integration test.

This change fixes an issue where IAM roles could not be used to run all of
the integration tests because of assumptions about the type of account
running the tests.
Update Botocore dependency
Bump version to 0.0.3
Rename ItemWithParameters
Merge pull request #27 from boto/model-update

Add batch actions and waiters to resource model.