Provides support for performing various install/update operations.

## Package Specification

This package contains interfaces for performing update/install operations without using the Update Manager user interface.

Note: This package is part of an interim API that is still under development and expected to change significantly before reaching stability. It is being made available at this early stage to solicit feedback from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken (repeatedly) as the API evolves.