Record in database which user released a submission

[Robert Lyon]

Currently when a submission is released it doesn't record which user did it and when

It would be good to have a table contain at least this info:

collection | view | submitted | released | submitter | releaser

Where the submitter / releaser are the user pushing the buttons

So that we could have something like

collection | view | submitted | released | submitter | releaser
-----------+------+---------------------+---------------------+-----------+------------
7 | 23 | 2016-10-04 12:37:55 | 2016-10-06 12:37:55 | 12 | 15
7 | 24 | 2016-10-04 12:37:55 | 2016-10-06 12:37:55 | 12 | 15
7 | 25 | 2016-10-04 12:37:55 | 2016-10-06 12:37:55 | 12 | 15
7 | 23 | 2016-10-07 11:22:11 | | 15 |
7 | 24 | 2016-10-07 11:22:11 | | 15 |
7 | 25 | 2016-10-07 11:22:11 | | 15 |

So if an admin is masquerading as a user they have their ID recorded rather than the user's one
so we know exactly who was playing with what

[Kristina Hoeppner (kris-hoeppner)]

And also mention who released the portfolio in the notification that goes out after the release.