Removes admins field from program creation

Part of the implementation of Github issue #608.
Gives admins implicit permissions

Since the admins field is no longer part of program creation, this makes
it easier for admins to be able to have deadline permissions on a
program: they will always have them. In the old schema, being an
administrator was the same as having recursive permissions, so this
change is a revert back to old behavior.
Adds alternate email fields to program creation

Adds alternate director email fields to program creation form