Support multiple derivation prov charts and multiple source prov charts per object

[gothub]

The prov editor doesn't allow a package member to have both input/outputs from a program and directly from a source or to a destination file.

In the above example, the package member Meierbachtol_inclinometry_allSensors.csv currently has a derived program, and the derived program has an output.

The user wishes to add another derivation to Meierbachtol_inclinometry_allSensors.csv that is
not an output from the program, but is instead a direct derivation from the .csv.

The prov editor should be able to allow both types of derivations for a package member.

In terms of the prov model, the following relationships should be able to be added:

Here is the use case as relayed by one of the datateam members:

t would be helpful to add the following functionality to the prov arrows: (1) allow multiple arrows to stem from the same dataset, such as a large zip file whose components are processed in 2+ ways, (2) allow file-less arrows with comments on how the files may have been manually modified (extracted from a zip, changed " " to "_" in column names, converted xlsx to csv, etc.)

[laurenwalker]

I know we talked about supporting multiple prov charts per object before. I thought we had created a Github issue for that before. I'm going to go ahead and change the title of this issue to better reflect that feature.

[laurenwalker]

As for #2 - (2) allow file-less arrows with comments on how the files may have been manually modified (extracted from a zip, changed " " to "_" in column names, converted xlsx to csv, etc.)

I think this is information that needs to get added to the science metadata.

[laurenwalker]

This is the most high priority provenance issue, so this should be prioritized for 2.1.0 over other prov issues.