If the user is Not signed in, they can see at least the different users' profiles.
FIXED Three BUGS:
"Anthony" and "anthony" should be ONE USER ( 2. same idea for conversations). 3. Activity.jsp was sending nullPointers because it could not find id(chat) -> so I changed it to the proper id.
Added Comparator for activities to be in order (Cool stuff)
Forces the activities made by Admin to be private.