Changes Unknown when pulling303480f on murrayrm:doc-update into ** on python-control:master**.

Changes Unknown when pulling93b50b1 on murrayrm:doc-update into ** on python-control:master**.

Changes Unknown when pulling349025b on murrayrm:doc-update into ** on python-control:master**.

From commit1f15678, names fromcontrol.robust are copied into the top-level (i.e.,control) of the package. This is the only set of changes of this PR that involves more than documentation.

I think that the change is reasonable because there have not been collisions among desired names of function or classes (at least, not that I am aware of). Furthermore, the change is consistent with the current pattern of organization.

The change in__init.py__ in commit1f15678 was actually required in order to get those functions to show up properly in the documentation. So while it has impact beyond documentation, there is a reason that it was included in this PR.

I just noticed another commit involving more than documentation:93b50b1.Your comment above applies here as well.

OK to include the change. I mention it here only as correction tomy earlier comment where I describe1f15678 as the only such commit.

There are several instances of trailing whitespace, but they are small and only in documentation, so I decided to merge and avoid further delay.