/kind feature

Packages (aka libraries) are currently globally namespaced within a ksonnet application. This means that conflicts will occur when referencing a package which is present in multiple registries.

For example, if registry incubator and registry helm both contain an nginx package, there is no way to correctly install it in the application.

The problem manifests itself in how registries and packages(libraries) are represented and persisted in app.yaml.

There are several approaches to disambiguating package names - these should be evaluated before implementing a fix for this issue.