Max limit for associated field

[certainlyakey]

Thanks for the plugin! It would be cool if while setting the second associated field we had an option to limit the maximum number of entries allowed. For example, I use it to associate journal publications with its print issues, and while one issue could have many publications, a publication could be related only to a single issue.

[peter-tell]

That's a great suggestion and when I get the time I'll for sure look into it. Based on my current schedule and workload it may be awhile though. If you wanted to fork the branch and submit a pull request, I'd be happy to incorporate it though.

Thanks!