delete resource and remove it from all appointments, and where needed the full reservation

[GoogleCodeExporter]

Please add a description of the requested feature here.
Delete a patient from the calendar is a tedious job when al lot of 
appointsments have that patient as a resource.
It shoudl be easier for the user to click richt on the patient, see the 
where-used list and have the possiblity to acknowled the physical removal of 
that resource out of all the appointemts ( and where needed the removal of the 
full reservation) followed bij the removal of the patient  resource itself.  
A permission optien should be assigned to the user to be able to do so. 

Original issue reported on code.google.com by icare4.rapla@gmail.com on 6 Jul 2015 at 9:17