Added in some code to use the computeMatricesFromInputs function.

The mouse input does not work as provided there is a very strange bug which
causes the camera to move left for a while before moving right when the mouse
is moved to the right and vice versa. I believe this is due to the cursor position
being altered somewhere outside my code. I'll look into this when I have more time
for now altering the view matrix is not a priority.