[Feature request] Update owner info from web services

[garrettjstevens]

From a user, on updating the owner from web services:

The use case we have for this would be, we are currently batch loading genes via webservices and we have a username api@local.host which we would like to change to another apollo user.

There are also cases where a user has made annotations on behalf of another person and we would like to change attribution to that person.

We should also check that the owner is being shown/update in the UI correctly as well, as @nathandunn noted:

The way this is supposed to work is that whoever edits it should be entered as an owner and there should be multiple owners attached through the Feature object.

What, in fact happens is that the original owner gets duplicated for some strange reason