Handful of minor fixes

[SimplicityGuy]

• Minor refactoring of the kernel driver release
• Indentation issue for an if/else
• Bare minimal style changes (there are many more to do here to be pass pylint, pep8, flake8, etc, but this is a start)

[SimplicityGuy]

Any objections if I do a more extensive PEP8 cleanup?

[alexforencich]

Might as well.

[SimplicityGuy]

Ok, I'll get those done as a single PR. Additional features will be a separate PR.

[alexforencich]

What features are you thinking about adding?

[SimplicityGuy]

At the moment, none. As we get into using our instruments with python-usbtmc a bit more, we'll see. I have features in python-ivi to add more immediately (such as exposing a timeout property).

[alexforencich]

Gotcha. I am going to go through all of the pull requests over the next couple of weeks and figure out what can be merged and what needs to be modified. There was also one implementing Rigol quirks for usbtmc, I will have to see if I can get that one to apply.