Implement "import" on a 'global' level

[domob1812]

This is a rough first implementation of recursive "import" support that simply replaces "import" fields in JSON objects (and does not handle subdomains). It works for d/kraftware.

[JeremyRand]

Thanks for working on this. Personally I think this should be implemented in the "data" plugin, not the domain namespace. Maybe as a "getValueProcessed" method, which all other namespaces would call instead of getValue. That way, the same code works verbatim for all namespaces, e.g. id/. How difficult would that be?

[domob1812]

No problem, I can try to rework it that way! I actually prefer to share it myself, since I believe that "import" should be done via a general spec that can be used for multiple specific namespaces (as you suggest). That's why I also added a "TODO" question in a comment.

Since I'm no expert with the nmcontrol code (and it isn't actually easy to comprehend how the things interact there), I decided to give it a first try as easy as possible before looking for a better place (and to gauge interest). Thanks for your reply, I think I now know better where to look ... I'll give it a try and submit an update in time (hopefully).

[domob1812]

Closing for now, will implement it in the data plugin instead.