Dependency Resolution & Interfaces

[Dessix]

Interfaces are not currently accounted for when resolving dependencies. Interface resolution should not add resolving packages automatically, but may request user interaction to assist in selection of means to fulfill said interface dependencies, unless a command-line flag specifies that such interaction is not allowed (similar to aptitude's "-y" flag). Unfulfilled interface dependencies should throw an explanatory DependencyException to allow the possibility of user-assisted resolution as well as to create proper, diagnosable output on failure.