Create Queue Data Structure

[anna-mat]

Create queue data structure that allows students to join the queue and allows instructors to manage the queue. (open and close the queue, remove students).

Estimated effort for each task: Large
Dependencies among tasks: #20
Milestones to indicate which sprint the issue should be completed in (Sprint 1, Sprint 2, Stretch): Sprint 2
Acceptance criteria that describes how you know this task is done - think about how you will test this feature: Create test suite to ensure students can join queue only once and instructors can remove students from queue, queue can be open and closed.