won't let you add a stage with the same name
disables you from adding a stage when a stage of that name exists
shows an error message if you try to add a stage that already exists
adds test to make sure a new stage isn't added when you try to make a duplicate
Give each task a boolean for archived, change delete button in etv to archive/unarchive, let Archive icon on Toolbar dragondroppedable, made archived tasks in workflow have yellow background color
clicking archive icon toggles archive view
enable archive/delete icons when starting to drag the tasks rather than when dragging on top of the icons
changed toggle for archive view from clicking the archive icon to clicking on a checkbox
Merge branch 'dev-gradle' of https://github.com/slash-slash-no-comment-WPI-cs3733/wpi-suite into archive
put delete button back on etv
stopped making archive button immeditely close etv
added back the delete warning dialog that i accidentally deleted and also made sure pressing the archive button does not get saved until save button pressed
Merge branch 'dev-gradle' of github.com:slash-slash-no-comment-WPI-cs3733/wpi-suite into stage_ids

Conflicts:
	TaskManager/src/main/java/taskManager/model/WorkflowModel.java
fixed the toolbar
archive button in etv takes effect immediately, listeners in view moved to their controllers, stopped using Booleans, stopped using getText, wfm now knows nothing about showing archives, reloads workflow immediately rather than waiting for server response
Merge branch 'dev-gradle' of https://github.com/slash-slash-no-comment-WPI-cs3733/wpi-suite into archive
throws an exception if the workflow fails to instantiate a stage
Merge branch 'dev-gradle' of github.com:slash-slash-no-comment-WPI-cs3733/wpi-suite into stage_ids
add tentative unarchive-icon and the archive icon now changes depending on whether user is dragging an archived/unarchived task
forgot to commit the icon