Right now, the collections store every point that is made on the wall, even if there is already a point there. That's inefficient. We should store only unique values.

The wall should load for the new user but stay as it is for all other users.

The proof-of-concept version of the app has one large collection for all points, as well as collections of canvases. It would be better to either have only collections of canvases (with points for the canvas contained within the canvas) or to at least deliver only the points relevant to the particular canvas that is loaded.

Right now, for the sake of speedy development, there are a number of variables in the global namespace. We should namespace them.