Real-time graph and whiteboard updates

[VictorSolal]

Test in conjunction with the same name submodule pull request. This requires at least 2 people to test; one will watch and the other will perform the graph updates.

• Everyone loads into the same project, either via ngrok or the linode server
• One person creates a visual scripting graph
• Everyone loads the graph onto the whiteboard
• One person checks out the graph and begins making edits, checking to make sure that every operation (add/delete parameters and nodes, edges, undo, and modify parameter value) is correctly showing in real-time on everyone else's whiteboards as well (the people that do not have the graph checked out
• Once done testing, the person that checked out the graph must check it in. Then, everyone exits the project and logs out.

[Morgan-Wilkinson]

Tested the pull request, we found that you cannot create a graph before another user joins the project.