Implements a basic picture upload functionality for the UCP.

Change-Id: I23e397376ff28fb761d3b70a616afaeb989264d7
Adds 'Change password' functionality to the UCP.

Change-Id: I28bd79512619be8e7ff08d75017605bf951538b8
Refactors the UCP to move the business logic to the UCPServlet
(unfinished)