Added User object.

Change-Id: I8e7a960710cb26a6da18c140add6986dcf939d13
Added P3P string to P3PFilter.

Change-Id: I9a90326951c421a8f08446a014299daed4cd1eca
Added user generator and actioned cookie drop.

Change-Id: I677f9fee5384aeb1cff46deaf3026a5373df38e8
Implemented the user cookie check.

Change-Id: I5b2677d1c03bce3c033b989e1ec254e8506445a8