Fabio Iocco / ctools

… ctcubemask for this purpose

…tion by a factor of 20 w/r to the counts cube.

Also document the new anumbins parameter.

…d in observation ebounds. Also added some improvements to csspec.

…no selection was performed)

This command was run:
  autopep8 --select E101,W191 --in-place --recursive .

It fixes only these two issues:
  - W191 indentation contains tabs
  - E101 indentation contains mixed spaces and tabs