[DS-1687] Porting Item Versioning to the JSPUI

Porting of the item level versioning as is at https://wiki.duraspace.org/display/DSDOC4x/Item+Level+Versioning
I'm try to manage the "Exposing version history" issue, in fact you find in this PR that the email of the editor is show only to admin user (Administrators and Collection/Community Administrators). Buttons to create new version and go to the history page has been added on the item splash page (display-item.jsp).

PLEASE NOTE: to enable the feature turn on in the versioning.cfg the enabled configuration parameter.