Bug 11395: New service to preview a record.

Bug 11395: New service to preview a record.

The main patch adds the ability to preview a record. This is done using
an AJAX way. The preview record is processed on the server side.

Note: I don't think an authentification check is necessary here.

Signed-off-by: Brendan Gallagher <brendan@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>