Added new module to documentation: boto.mturk.layoutparam
Added new parameters (storage_class, all_versions, and src_generation) to mock_storage_service methods (copy_key, create_bucket, and list_bucket). gsutil's test_commands.py and test_wildcard_iterator.py were failing without this.
Merge pull request #1142 from jterrace/mock-versioning-storage-class-fixes

Fixed mock objects to have new method parameters
[MTurk CLI] Use "h", not "hr", for hours.
[MTurk CLI] Use "www.mturk.com" instead of "mturk.com".

The TLS certificate requires this.
Added exists() to StorageUri for use with the gsutil noclobber feature.
Added exists() to StorageUri for use with the gsutil noclobber feature
Merge pull request #1139 from reversefold/lbcookiestickiness_expirationoptional

Support None for cookie_expiration_period
Merge pull request #1138 from reversefold/instance_create_image

Add a convenience create_image method on EC2 Instance objects
Plumbed headers into the exists methods.
Changed headers to _headers_not_used for the FileStorageUri exists method
Added comment and named parameter.
Merge pull request #1145 from reinhillmann/develop

Added exists() to StorageUri for use with the gsutil noclobber feature.
[MTurk CLI] Moved some of the interactive code to functions.
[MTurk CLI] Display MTurk error messages cleanly.
connection: use right host for tunneled https connections
ReplaceRoute action was missed. So, added.
[MTurk CLI] Show description and keywords for the "hit" command.
S3Connection.build_post_form_args(): do not add 'content-length-range' to fields
Fix docstring for get_all_reserved_instances.  Fixes #1118.