cmake and python style formatting

[chapman39]

It would be nice for developers to have make style update cmake and python in addition to cpp/ hpp files. In particular, automatically adding newlines at EOF.

As far as I know this would involve...

• adding py-yapf and py-cmake-format (or others with similar functionality) as devtool dependencies
• adding a .cmake-format.py and .style-yapf to root of project
• adding these packages to the build via cmake, if devtools is enabled