Beautify console output from the `retrieve` command

Currently the console output of the `retrieve` command show the complete and raw return from the web API. While this might be helpful in some cases (e.g., automation) for most users it is not. 
Therefore, the results should be beautified to allow console users a nicer view to the data.

Also see delphi-hub/delphi-webapi#15 for the creation of the new server-side format.