Windows Azure Blob Storage provides support to work with a "root container".
This means that a blob can be stored in the root of your storage account,
i.e. http://myaccount.blob.core.windows.net/somefile.txt.
In order to work with the root container, it should first be created using the
createContainer() method, naming the container
$root. All other operations on the root container should be issued
with the container name set to $root.