Can now acquire real images of things in the world!
Changed up the rotation stuff to make it look right but still use image-style coordinates.  Also set default CCD temp to -40.
Implemented a scheme for transforming from user ROI to camera ROI, but it's horrible and embarassing in several ways.  Also it's untested, although it compiles.
Looks like I will have to move some of the userspace<->cameraspace stuff into the Camera.  But before I do that, replacing binWidth, binHeight with binSize to make things simpler.
Coded in the assumption that the bins are square.