users and switching tasks are not displayed
user auto gen only shows remove/add. no names.
Change-Id: I9371ef3dce5dc96f791b0deca1d7e292a7d719cd
refactored around so taskPresenter does the compareTo method on tasks
Thus, taskModel no longer needs to hold the whole list of users.
Merge branch 'feature/comments4' into feature/colors4
AND fixed a bug with unmodified/modified for category label.
comments are displayed for labels as well

Conflicts:
	TaskManager/src/main/java/edu/wpi/cs/wpisuitetng/modules/taskmanager/model/TaskModel.java
Change-Id: Ie1f540fafe05a8d5b100284baa902dc9b628ee94