Capture download all

[kamilprz]

Currently retina capture download returns all of the files related to the capture, with a .tar.gz per node, as appropriate. This means that if there are two nodes there will be two .tar.gz files returned.

The ask in this issue is to add a way to retrieve all of the relevant files under one .tar.gz. For example this could be a flag which is passed, or the default behaviour of the download operation is changed.

Definition of done: There is a way to obtain .tar.gz files from multiple nodes, retrieved under one .tar.gz as the final output to the user