Revert "Added a list of users for every plate. This will allow multiple users to have access"

This reverts commit 2ffc1c2b82aedb53888c36688b64bcece0338248.
Added listPlates, assignPlate, unassignPlate, listPlateByUser
Plates schema has a asignee and a isAssigned flag
Merge branch 'master' of https://github.com/dejesus2010/CEN3031Project

Conflicts:
	mean/app/controllers/projects.server.controller.js