[rackspace] Queues: makes block optional when dequeuing
Added docs/tests for Storage's public_url
Merge pull request #3230 from josuelima/optional_block

[rackspace] Queues: makes block optional when dequeuing
Merge pull request #3231 from mdarby/storage_directory_test_and_doc

Added docs/tests for Storage's public_url
Add :job_poll_timeout to the list of recognized options.
Merge pull request #3235 from pdrakeweb/job_poll_timeout

Add :job_poll_timeout to the list of recognized options.