Minor formatting changes and fixed speeds
Minor formatting changes and fixed speeds

Lots of tiny tweaks to comments.
Also, I made the speeds distribution cut off at n//2 instead of the old
hard-coded approach that assumed a 1000x1000 basis set and cut off at
500. Since we have square images, we need to cut off the speeds
distribution so that we don’t look at the corners.

DhrubajyotiDas/PyAbel,rth/PyAbel,huletlab/PyAbel,stggh/PyAbel,PyAbel/PyAbel