Remove project from list, and ask for removing files from disk

So the above chunk of code will almost do what we want:

If the user wants to remove the app from cache and disk we must invoke two methods:
``DELETE      /api/app/history/*appId                      controllers.Application.forgetApp(appId)``
and
``PUT         /api/local/delete                            controllers.api.Local.deleteFile``

If the user just want to remove the app from the cache then this is enough:
``DELETE      /api/app/history/*appId                      controllers.Application.forgetApp(appId)``

The ``DELETE`` method removes the app from the cache on the server. The ``PUT`` method is the one that actually removes the files from disk. Please note that the latter method takes ``location`` as part of the input.