* "image" has been renamed to "projection" everywhere. This is due to the fact that "image" is ambigious and can refer either to a 3D reconstruction (what clinicians call image) or a set of projections (what a mathematician would call image). As such, we now call the two spaces "object" space and "projection" space. The `projections` submodule has been renamed to `projectors` to remove any confusion with the projections as being a data type. Various arguments like `im2im_transforms` have been renamed to `proj2proj_transforms`. Please see the tutorials for how code has changed.
* readthedocs page has been updated with a link to the PyTomography paper on arxiv. Eventually this will be updated with the paper link on Medical Physics, once it's published there.