util is a set of utilities developed to utilise with the Dojo Toolkit. It is best to read the documentation to understand what tools are available within the repository.
Installation instructions are available at dojotoolkit.org/download.
If you are starting out with Dojo, the following resources are available to you:
The Dojo Toolkit (including this package) is dual licensed under BSD 3-Clause and AFL. For more information on the license please see the License Information. The Dojo Toolkit is Copyright (c) 2005-2016, The JS Foundation. All rights reserved.