Publication 'Publisher' as a related Contributor about gcis

[rewolfe]

Example of the publisher linked through a relationship (the way we would like this to be): http://data.globalchange.gov/book/03826610-743d-4e51-a08e-8fe8d294fa83

[lomky]

So, instead of having the publisher in the column of the publication table, we want the publisher to exist as a contributor and relate it properly.

Good candidate for a scriptable fix.

We want to remove the publisher field from the table after migration is complete.

[lomky]

This is done! #548 #549 #553