RF: info.py - pylint-prompted style changes
RF: replace some import * with specific imports

- some other minor pylint inspired changes
RF: some pylint style tweaks for data.py

- imports, exceptions, some whitespace, multi-statement lines
- openpyxl imports are still done several places
RF: style tweaks in builder.py
RF: microphone code clean-up
Merge pull request #563 from jeremygray/master

pylint-based style changes, esp in info, data, microphone, builder