Provide an overview of dependencies between bundles

[jbgerth]

Some bundles have other bundles as dependencies. Usually, all of the dependencies are installed automatically, when calling plural bundle install <bundle>. This behavior works well and is desired. But it is not clear, which components will end up on the cluster.

Therefore I propose, to show all components, that will be installed. This could be done for example:

• Using a picture of DAG in the plural console UI
• A simple output like in apt-get, where a preview is given of all newly installed packages