Improved EndnoteXML and RIS export

[adam3smith]

The current EndnoteXML and RIS export is not as good as it could be.
Working with

• the RIS specifications (extracted from when they were still public) here:
  https://github.com/aurimasv/translators/wiki/RIS-Tag-Map-(narrow)
• The EndnoteXML specifications: http://help.thomson.com/default.asp?portalid=TSCINT&article=122577
• As well as export of an item with type "dataset" from Endnote X7.

I'm proposing the following improvements. I'm happy to provide a mapping as spreadsheet, but have for now just the alternate formats contrasted:
Endnote XML: https://gist.github.com/adam3smith/095f689feadd06946f37026e7dbc8682
RIS: https://gist.github.com/adam3smith/907303c0ed098477430fd87b55443f39

We can help implement these changes, but I wanted to put them up for discussion first.
Note that some mappings may seem a bit arbitrary (e.g. reviewed-item as Geographic coverage), but correspond to what Endnote does and what at least Zotero aims to follow.

I haven't done anything on BibTeX because it's such a poorly defined format to make a definite mapping very tricky.

For reference, @jggautier 's previous work on mapping bib formats:
https://docs.google.com/spreadsheets/d/1ZW5-KmKk5dJWZAD12m7xc1i11xtEY_4vCvTVK72bG38/edit#gid=0

[adam3smith]

• ToDo: The same for data files

[pdurbin]

@adam3smith @qqmyers are any of these changes in pull request #4802? I see that BibtexCitation.java has been deleted and the code has been refactored.

[qqmyers]

They aren't yet. I was planning to add them once there are matching suggestions for the file citations - with the refactor, there's common code generating both the dataset and file (indirect and direct) citations, so its useful to know what fields will be in common before coding.) That said, I could go ahead if its useful to see the dataset updates first.

[adam3smith]

Let's wrap this in one. I'll make the file citations momentarily -- They're very similar.

[adam3smith]

OK, I've updated the files on the gists to include data files, they use the same metadata as the dataset with the following changes:
Dataset title --> secondary title / T2 (previously unused)
Filename --> title / TI
Filename description --> abstract/ AB (replacing dataset description)

This is ready from my end -- @pdurbin did you want to discuss the mapping before Jim implements that?

[pdurbin]

@djbrooke @scolapasta what do you think? Do you want all the work for #4777 and this issue to be combine in the same pull request?

[djbrooke]

I won't be picky about small batches here from a process standpoint here. I know Gustavo has some
code review going on for #4777, so it's up to @scolapasta if he's OK including this as well.

[qqmyers]

I think this all went in #4777 and related - is there anything left open?

[pdurbin]

@qqmyers ah, if so, we should have added a "connect to" for this issue in pull request #4971, which was merged and released in Dataverse 4.9.3. But if it's done are you saying it's ready to go to QA? If so, please add a "how to test" comment if you think it would be helpful.